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(1 comments) SHARE        Wednesday, June 29, 2016
26 days after the NIH's National Toxicology Program reported that cell phone radiation definitively causes cancer 26 days after the NIH's National Toxicology Program reported that cell phone radiation definitively causes cancer, FCC Chair Tom Wheeler announced the Spectrum Frontiers Proceeding. On June 20, Wheeler said that 5G "is a national priority....

(2 comments) SHARE        Saturday, March 7, 2015
France: New National Law Bans WIFI in Nursery School France: New National Law Bans WIFI in Nursery School!

SHARE        Saturday, March 21, 2015
Remarkable New Radiofrequency Radiation Cancer Animal Study The RF-cancer story took a remarkable turn a few days ago. A new animal study challenged many of the assumptions that lie at the heart of claims that RF radiation--whether from cell phones, cell towers or Wi-Fi--is safe.

SHARE        Friday, January 2, 2015
Swedish Researcher Reports Key Studies Showing How Ants, Bees and Children Respond to Exposure to EM Radiation From Wi Dr. Olle Johansson, noted Swedish researcher at the Karolinka Institute in Stockholm, recently compiled this list of studies that show how ants, bees and children respond to exposure to electromagnetic radiation emitted by wireless technologies.

(1 comments) SHARE        Tuesday, November 11, 2014
Part 2 of An Electronic Silent Spring Please, let's get informed about the biological effects of electronics. we've got to start making limits. To begin, consider not using mobile devices around pregnant women or children.
Series: Electronic Silent Spring-- Katie Singer (2 Articles, 3649 views)

SHARE        Sunday, March 8, 2015
Electromagnetic Hypersensitivity: A Summary by Dr Erica Mallery-Blythe We are currently witnessing the largest change to the Earth's electromagnetic environment that has ever taken place in human history. Download Electromagnetic Hypersensitivity: A Summary by Dr Erica Mallery-Blythe

(1 comments) SHARE        Monday, August 24, 2015
Back to School with Safer Tech Back to School with Safer Tech

SHARE        Tuesday, March 24, 2015
Solar Power Inverters and Magnetic Fields Solar Power Inverters and Magnetic Fields

(5 comments) SHARE        Friday, October 23, 2020
A geek researches 5G A geek researches 5G Letter to Greta Thunberg: how 5G contributes to climate change
Series: Dear Greta (8 Articles, 8520 views)

SHARE        Saturday, December 13, 2014
Cellphones, Cell Towers and Wildlife - Part 1 Scientists describe the effects of exposure to electromagnetic radiation (EMR) from wireless devices on trees, ants, bee colonies, frogs and birds.

(11 comments) SHARE        Saturday, January 23, 2021
How deep is 5G fake news? A letter to Greta Thunberg 5G's costs, benefits and myths by Miguel Coma

SHARE        Wednesday, November 13, 2019
Electronic Visit Verification In 2016, the U.S. Congress enacted and President Obama signed into law the 21rst Century CURES Act, which mandates Electronic Visit Verification (EVV) of Medicaid-funded personal care or home health services.

(2 comments) SHARE        Sunday, November 23, 2014
Calming Behavior in Children with Autism and ADHD The Electromagnetic Radiation (EMR)-Lowering Protocol Here, a pediatrician, two scientists and a father explore the environmental factors that may worsen illness in children with autism--and what can reduce the disorder's severity.

(1 comments) SHARE        Friday, February 27, 2015
Slingshots at Goliath Here's a partial list of actions taken by international government agencies and professional organizations in response to concerns about the health and environmental effects of exposure to radiofrequency radiation.

SHARE        Friday, September 30, 2016
The FCC seeks Comments regarding the addition of yet more frequencies to the 5G spectrum. On July 14, 2016, the FCC enacted the Spectrum Frontiers Proceeding, 5th generation (5G) mobile operations. 5G will use millimeter wave bands including 24-25 GHz, 32 GHz, 42 GHz, 48 GHz and 51 GHz. Commercial deployments will begin in 2020.

(2 comments) SHARE        Wednesday, August 3, 2016
FCC Commissioners voted unanimously in favor of the Spectrum Frontiers Proceeding on July 14, 2016 Twenty years ago, during Bill Clinton's presidency and Reid Hunt's chairmanship of the FCC, the U.S. Congress passed the Telecommunications Act of 1996 (the TCA). Section 704 prohibits environmental and health concerns from interfering with the placement of telecom equipment. Regardless the public's awareness of this federal law, we all live downwind of it. Here are some recent e-developments. --Katie Singer

(1 comments) SHARE        Wednesday, August 15, 2018
URGENT Action Alert -Contact Congress ASAP about Its FCC Review This Thursday, August 16, the Senate's Commerce, Science & Transportation Committee will query FCC Commissioners about their oversight of issues related to wireless communications.

(1 comments) SHARE        Friday, November 15, 2019
Our Web of Inconvenient Truths What are the true costs of each Google and GPS search; every social media post and video stream; every email, text message and Skype call; every online purchase; every transfer of funds or medical or educational records; every "smart," "energy-saving" Internet-of-Things-connected refrigerator messaging its owner to buy more milk?

(2 comments) SHARE        Thursday, September 1, 2016
Priorities: Mobility or Survival? Election season and starting a new school year have us clarifying priorities. In public and private discourse, we need to include that using technology has long-term consequences.

(1 comments) SHARE        Saturday, February 14, 2015
Electricity UNDER Power Lines John Minton's 2006 video, "Fluorescent Lights Under High Voltage Power Lines," shows bulbs lighting up by electrical energy they access outside, without wiring, under power lines.

(1 comments) SHARE        Tuesday, November 1, 2016
Telecom corporations are now deploying "small cells" on utility poles Around North America, telecom corporations are now deploying "small cells"--small cellular antennas--on utility poles. Sometimes called distributed-antenna systems (DAS), these antennas provide citywide Wi-Fi. I've heard of one proposal to install 700 antennas around one town with one permit. I've heard of antennas going up with no permit.

SHARE        Thursday, January 24, 2019
The Unbiased Truth About Cell Phone Radiation and 5G Wireless; Free Conference Livestreaming of The Real Truth About Health Free 10-Day Conference

(1 comments) SHARE        Saturday, April 25, 2015
"Civil Rights for Cell Tower Corporations? You've Got to be Kidding!" "Civil Rights for Cell Tower Corporations? You've Got to be Kidding!" Paul Cienfuegos' April 21st, 2015 Commentary on KBOO Evening News

(2 comments) SHARE        Thursday, November 6, 2014
An Electronic Silent Spring; part 1 Besides home, I'm looking for people who want to know technology's dangers and who'll practice self-regulation to protect nature and health. I figure I've come to the right place. I'd like to spell out some troubling rules and studies about electronics, & some regulations we can implement ourselves. But first, let's go back a few billion years, before man-made laws or mobile phones, when this planet was a mass of gasses, wa
Series: Electronic Silent Spring-- Katie Singer (2 Articles, 3649 views)

(2 comments) SHARE        Friday, May 8, 2015
Princeton University Pulls WiFi Safety Assurances A website has released emails and screenshots detailing how Princeton removed a position statement that their wireless networks "do not present a hazard," after letter writing campaign by concerned parents.

SHARE        Friday, September 25, 2015
Rules & Regulations About Electricity, Electronics, Wireless Devices, Electric & Telecom Infrastructure: A Study Guide As new products and technologies emerge and understandings of risk and dangers develop, regulations and rules are created

SHARE        Wednesday, November 21, 2018
Our Web of Inconvenient Truths Every day, I learn about new changes that decrease consumers' choices around technology, increase energy consumption (by deploying new layers of infrastructure and marketing new devices), and increase EMR exposure.

(5 comments) SHARE        Monday, April 27, 2020
Behind the Screens: The True Costs of Internet Access Several years ago, I started wondering about the Internet's energy use, greenhouse gas emissions, toxic waste and worker hazards. Nearly every day since then, I've learned something else about the true costs behind our screens, about what it really takes to send an email or stream a video.

(1 comments) SHARE        Thursday, December 3, 2020
A brief history of electricity and telecommunications A brief history of electricity and telecommunications A letter to Greta Thunberg by Katie Singer
Series: Dear Greta (8 Articles, 8520 views)

(3 comments) SHARE        Thursday, January 14, 2021
How we manufacture silicon: computers' crucial ingredient not found in nature Note that transporting the raw materials necessary for silicon production between multiple countries, via cargo ships, trucks, trains and airplanes uses oil and generates greenhouse gases.

SHARE        Sunday, February 15, 2015
A Model Letter To School Administrators and Parents from Anyone Concerned About Children's Health A Model Letter Drafted by Katie Singer To School Superintendents, Principals, Board Members, Faculty, Staff and Parents from Anyone Concerned About Children's Health

(6 comments) SHARE        Wednesday, February 24, 2021
Re-Evaluating Solar Photovoltaic Power Considering the ecological impacts we aim to reduce

(1 comments) SHARE        Tuesday, May 19, 2015
Safer Solar Power: Notes and Resources Safer Solar Power: Notes and Resources

SHARE        Saturday, May 16, 2015
Scientists & Doctors Tell Canadian Parliament that Autism & Cancer May Be Linked to Cell Phones & Wifi Scientists & Doctors Tell Canadian Parliament that Autism & Cancer May Be Linked to Cell Phones & Wifi

SHARE        Tuesday, December 22, 2020
5G: A Genie at our Fingertips? Miguel Coma is an engineer in telecommunications and an Information Technology architect. After a decade in telecommunications (with two mobile operators and an equipment manufacturer), he now works as an enterprise architect in the bank-insurance sector. He believes in technology's potential to create sustainable progress.

(1 comments) SHARE        Thursday, July 12, 2018
Statement for the United Nations' July, 2018 High Level Political Forum on Sustainable Development Statement for the United Nations' July, 2018 High Level Political Forum on Sustainable Development To be presented by Katie Singer www.electronicsilentspring.com

(1 comments) SHARE        Tuesday, July 14, 2015
Backup Power for Cell Phones The FCC's apparently preparing for landline extinction.

SHARE        Friday, May 15, 2015
Greater risk of miscarriages within 100 meters of cell phone towers Epidemiological investigation of risk factors of the pregnant women with early spontaneous abortion in Beijing

SHARE        Monday, May 11, 2015
Learning About Community Rights Learning About Community Rights

(1 comments) SHARE        Saturday, December 6, 2014
Maryland City Votes to Oppose Cell Towers On School Grounds Maryland City Votes Unanimously to Alert Citizens to the Health Risks of Cell Phone/Wireless Radiation and to Oppose Cell Towers on School Grounds

(3 comments) SHARE        Friday, April 17, 2015
The Education of an Electronics User Transcript of talk first given by Katie Singer at Colorado Chautauqua, Boulder, CO, April 7, 2015.

SHARE        Tuesday, June 25, 2019
Remembering Bob Berry in His Own Words The arborist Bob Berry, PhD, died peacefully March 25th, surrounded by family. Born July 31, 1938, Bob loved everything in the natural world.

SHARE        Thursday, March 12, 2015
International Policy Actions on Wireless by Governments, Authorities and Schools INTERNATIONAL PRECAUTIONARY ACTIONS by Governments, Authorities and Schools.

SHARE        Monday, April 27, 2015
An Electronic Silent Spring April, 2015 Newsletter from Katie Singer An Electronic Silent Spring April, 2015 Newsletter from Katie Singer

SHARE        Monday, October 5, 2020
Dear Greta: Letter #2 - Test Your Internet-Footprint IQ by Katie Singer Letters to Greta report on the ecological impacts of streaming video, 5G, manufacturing smartphones, e-vehicles, solar panels and wind-turbine systems.
Series: Dear Greta (8 Articles, 8520 views)

SHARE        Monday, May 11, 2015
Corporate Sales and Digital Citizens Corporate Sales and Digital Citizens

(7 comments) SHARE        Thursday, November 5, 2020
Proposing Cradle-to-Grave Evaluations for All Vehicles Letter to Greta Thunberg: why maintaining a gas-guzzler may cause less harm than buying a new e-vehicle
Series: Dear Greta (8 Articles, 8520 views)

SHARE        Tuesday, April 21, 2015
"Aiming to First Do No Harm: The Education of Electronics Users" "Aiming to First Do No Harm: The Education of Electronics Users" looks at four generations of education and regulation around electronics, including regulation around electronic interference with medical implants. Walking through metal detectors, driving a Prius, being near "smart" meters can reprogram or shut off medical implants like deep-brain stimulators.

SHARE        Wednesday, September 23, 2020
Dear Greta: Letter #1 - Dreaming of a Visible Internet Footprint by Katie Singer A letter to Greta Thunberg from Katie Singer about the Internet's footprint
Series: Dear Greta (8 Articles, 8520 views)

(1 comments) SHARE        Friday, January 25, 2019
Announcing Our Web of Inconvenient Truths: The Internet, Energy Use, Toxic Waste and Climate Change A new book from Rudolf Steiner Books about the Internet and climate change: Our Web of Inconvenient Truths: The Internet, Energy Use, Toxic Waste and Climate Change

(3 comments) SHARE        Wednesday, May 24, 2017
Children, Schools, Tech and Regulation The latest news about children, schools, tech and regulation

SHARE        Wednesday, May 13, 2015
Best Resource on Peer Reviewed Studies About EMR Exposure and Health Best Resource on Peer Reviewed Studies About EMR Exposure and Health

SHARE        Monday, August 17, 2015
FCC's Newest Ruling Will Allow Wireless Devices to Operate on the Same Frequency as Medical Monitors In early August, 2015, the Federal Communications Commission (FCC) adopted a rule that will allow unlicensed devices (such as bluetooth technologies, mobile phones and garage door openers) to operate on the same frequency as heart and fetal monitors used by hospitals.

(4 comments) SHARE        Monday, July 27, 2015
Rules and Regulations for Wireless Technologies First, the bad news: The FCC is apparently preparing for landline extinction.

(1 comments) SHARE        Saturday, August 8, 2015
Dental X-Rays: A Question from a Reader Dental X-Rays: A Question from a Reader

SHARE        Sunday, December 21, 2014
Cellphones, Cell Towers and Wildlife - Part 2 Here is more crucial material about cellphones, celltowers, and bird migration.

SHARE        Friday, April 17, 2015
Letter from a School Librarian in Grahamstown, South Africa Letter from a School Librarian in Grahamstown, South Africa

SHARE        Friday, December 30, 2016
Digital Fitness Personal fitness coach, Ryan Munsey of NaturalStacks.com, interviews Katie Singer about why and how to reduce your household's exposure to screen-time and man-made electromagnetic radiation.

(1 comments) SHARE        Tuesday, February 14, 2017
Inviting Discussion About Safer Tech Use in Schools This paper aims to encourage discussion about safer, more responsible use of technology in educational settings. It presents critical issues and options for consideration.

(1 comments) SHARE        Friday, January 23, 2015
Real EMF Solutions To protect yourself from man-made electromagnetic radiation (EMR), you need to reduce your exposure to it. Immediately, you can:

(1 comments) SHARE        Friday, July 3, 2015
What is Health? A Conversation After Reading An Electronic Silent Spring - Part 1 What is Health? A Conversation After Reading An Electronic Silent Spring Between Reader ZL and Author Katie Singer Part One

(8 comments) SHARE        Sunday, September 4, 2016
As school begins, commit to balancing tech use with non-electronic activities Cris Rowan, CEO of Zone In Programs, recommends not giving children electronic devices until foundational skills in reading, printing and doing math on paper are established.

(1 comments) SHARE        Wednesday, June 29, 2016
Essential Questions Before You Power Up Essential Questions Before You Power Up 1. How did the FCC determine that your device is safe?..

SHARE        Tuesday, November 1, 2016
Love that s l o w speed: 15 Steps Toward Reducing Energy Use and Hacking Risks While Maintaining Emergency Prepare (Yup: 15 steps will decrease all three) by Katie Singer www.electronicsilentspring.com

(1 comments) SHARE        Sunday, July 12, 2015
What is Health? - A Conversation After Reading An Electronic Silent Spring Part 2 What is Health? A Conversation After Reading An Electronic Silent Spring Between Reader ZL and Author Katie Singer Part Two

(1 comments) SHARE        Monday, December 22, 2014
Give EMF Solutions (Instead of Electronics) Instead of electronics, give your loved ones EMF Solutions.

(1 comments) SHARE        Saturday, January 31, 2015
Cellphones Cause Cancer: A Few Worthwhile Minutes from Attorney Jimmy Gonzales, 1972-2014 Cellphones Cause Cancer: A Few Worthwhile Minutes from Attorney Jimmy Gonzales, 1972-2014

SHARE        Thursday, November 3, 2016
The American Academy of Pediatrics has issued new recommendations about children's screen time and cell phone radiation The American Academy of Pediatrics has issued new recommendations about children's screen time and cell phone radiation exposure. Check out early childhood educator Dr. Roxana Marachi's response

(1 comments) SHARE        Tuesday, December 30, 2014
A British MD Describes How Wireless Tech Affects Children Please listen to Dr. Erica Mallory-Blythe's excellent talk, "Electromagnetic Radiation, Health and Children," given in the Fall of 2014. Dr. Mallory-Blythe is a British MD. She describes multiple studies that show how exposure to EMR affects children--along with ways we do not yet have a full picture.

SHARE        Monday, November 23, 2020
Green 5G or red alert? Engineer Miguel Coma has responded to Huawei's claims that 5G will reduce greenhouse gas emissions.

(2 comments) SHARE        Thursday, February 4, 2021
Basic needs, electrified: What we expect from electricity Once energy became abundantly available, the way we humans think about our daily lives changed radically.
Series: Dear Greta (8 Articles, 8520 views)

(1 comments) SHARE        Sunday, January 3, 2021
The Rules and Regulations that Define Us: A letter to Greta Thunberg Historically, rules protected health and nature. Contemporary regulations protect technology.

(2 comments) SHARE        Tuesday, December 30, 2014
Advice to Pregnant Women from the Chair of Yale Medical School's Ob/Gyn Department To everyone who cares about the health of pregnant women and their babies, please take seven minutes to watch this video about pregnancy, cell phones and Wi-Fi, which features Dr. Hugh Taylor, who heads Yale Medical School's Department of Obstetrics and Gynecology.

(2 comments) SHARE        Tuesday, October 13, 2020
Dear Greta Letter #3 Behind Our Screens: An invitation to learn a smartphone's true costs Behind Our Screens: An invitation to learn a smartphone's true costs
Series: Dear Greta (8 Articles, 8520 views)

SHARE        Wednesday, January 28, 2015
Filtering Magnetic Fields: A Discussion with Electrical Engineer Al Hislop Here, electrical engineer Al Hislop describes how filters work and how they can increase magnetic fields. Al designed and built parts for the WMAP spacedraft, the first spacecraft to make precise measurements of cosmic-background radiation. He also designed and built parts for the Rosetta spacecraft, currently orbiting comet 67P/Churyumov-Gerasimenko. The documentary "Broadcast Blues" shows Al.

(2 comments) SHARE        Tuesday, March 5, 2019
5G, Fiber Optics & the Law An excerpt from Our Web of Inconvenient Truths: The Internet, Energy Use, Toxic Waste & Climate Change (forthcoming in May from SteinerBooks) by Katie Singer, www.electronicsilentspring.com

(2 comments) SHARE        Friday, June 12, 2015
Fertility Awareness and Electronics A Conversation with Sarah Bly's FA Teacher-Trainers and Katie Singer June 1, 2015 * Notes compiled by Katie Singer

(1 comments) SHARE        Monday, January 23, 2017
Let's make 2017 the year of What We Can Do Let's make 2017 the year of What We Can Do Ask questions that invite conversation. Then: listen.

(1 comments) SHARE        Sunday, January 25, 2015
EMF Exposure in Cars A Question from a Concerned Citizen An Answer from Dr. Gary Olhoeft

(7 comments) SHARE        Friday, November 13, 2020
Defining "carbon neutrality" before enacting new policies To reduce global emissions and extractions, we'll need a wider view. We'll need to question our assumptions and goals about technology and sustainability.
Series: Dear Greta (8 Articles, 8520 views)

(1 comments) SHARE        Thursday, December 4, 2014
Radiation Soup - Katie Singer Speaks at the Techno-Utopianism and the Fate of the Earth Teach-In in NYC Oct. 25, 2014 Katie Singer, author, most recently of An Electronic Silent Spring, spoke at the Techno-Utopianism and the Fate of the Earth Teach-In at Cooper Union in New York City on October 25, 2014. Here is the audio recording of Singer's talk.

SHARE        Tuesday, June 30, 2015
Questions to ask family members, neighbors and friends (then sit back and listen for thinking to be revealed) Questions to ask family members, neighbors and friends (then sit back and listen for thinking to be revealed): Do you think wireless technologies like mobile phones and Wi-Fi are safe?

SHARE        Saturday, February 13, 2021
Counterbalancing use of electronics by connecting with the Earth Here are a few steps toward counterbalancing our technology use.

(1 comments) SHARE        Sunday, December 13, 2020
How to revise our consuming love affair with electronics Our digital society consumes extraordinary amounts of energy and extracted ores.

SHARE        Thursday, February 5, 2015
Cars, EMFs and EMR a teleconference hosted by Inter-Occupy's Sandi Fields facilitated by Katie Singer, author of An Electronic Silent Spring with geophysicist and electrical engineer Dr. Gary Olhoeft and biophysicist Dr. Bill Bruno January 29, 2015

(1 comments) SHARE        Friday, December 18, 2015
Katie Singer Interviews Ed Friedman about "Smart" Meters in Maine and Global WiFi for an Occupy Teleconference Katie Singer interviews Ed Friedman about "smart" meters in Maine and global WiFi for an Occupy Teleconference

SHARE        Saturday, May 7, 2016
Radiant Times Cartoons - May 6, 2016 - Landlines Cartoon about health, technology and society by Katie Singer

(2 comments) SHARE        Saturday, February 7, 2015
Smart-meter fire kills 74-year-old man in Dallas, Texas Along with EMR emissions, fires caused by 'smart' meters also need investigation before more 'smart' meters are deployed.

SHARE        Sunday, December 27, 2015
Radiant Times - December 19, 2015 Radiant Times - December 19, 2015

SHARE        Tuesday, March 16, 2021
"Berta Ca'ceres in Defense of Water Rights;" Reducing Energy/RECORDED Discussion In March, 2016, after successfully organizing opposition to the Agua Zarca Dam in Honduras, Berta Ca'ceres was murdered in her home.

SHARE        Wednesday, October 7, 2015
Comment for the Access Board about EMR Exposure Regulation of electronic technologies has not kept up with deployments. As a result, several segments of the population are exposed to dangerous levels of electromagnetic radiation (EMR) and screen-time.

SHARE        Monday, October 5, 2015
Teaching Fertility Awareness and Wireless Tech Hazards Around the World: An Interview with Katie Singer Since the mid-90s, Katie Singer has taught and written about Fertility Awareness, an evidence-based form of natural family planning. Katie advocates for menstrual cycle health. She has worked in Amish, African, Guatemalan and other communities. She has also become a leading spokesperson about reducing our use of electronics to reduce energy use and exposure to electromagnetic radiation (EMR).

SHARE        Wednesday, January 28, 2015
The Real Amount of Energy Used to Power the Internet Please read Jane Anne Morris' excellent piece about the real amount of energy used to power the Internet. Has anyone written about the amount of energy required to manufacture (and transport to consumers) the devices that access the Internet? In the Atlantic, Yepoka Yeebo recently described the impact that discarded devices (66 pounds per year per Westerner) have on one Ghanaian community.

(1 comments) SHARE        Tuesday, May 31, 2016
Radiant Times Cartoons - The Pettipas Case - May 31, 2016 Cartoon about health, technology and society by Katie Singer

(1 comments) SHARE        Monday, February 29, 2016
Radiant Times - February 26, 2016 Radiant Times - February 26, 2016

(2 comments) SHARE        Saturday, December 19, 2015
Question from Reader about Electronics in the Bedroom Question from Reader about Electronics in the Bedroom

(1 comments) SHARE        Tuesday, February 9, 2016
Radiant Times Cartoons - February 8, 2016 Radiant Times Cartoons - February 8, 2016

SHARE        Tuesday, January 5, 2016
Radiant Times -- January 4, 2016 Radiant Times Cartoons

(1 comments) SHARE        Thursday, December 3, 2015
Notable Work A selection of notable work

(1 comments) SHARE        Thursday, February 11, 2016
Radiant Times Cartoons - February 11, 2016 Radiant Times Cartoons - February 11, 2016

(1 comments) SHARE        Tuesday, February 16, 2016
Radiant Times Cartoons - February 15, 2016 Radiant Times Cartoons - February 15, 2016

SHARE        Monday, December 28, 2015
Radiant Times Cartoon - December 27, 2015 Radiant Times Cartoon - December 27, 2015

(3 comments) SHARE        Wednesday, April 14, 2021
Fresh perspective on four and a half billion years Fresh perspective on four and a half billion years--and a question for humanity a column about nature and technology

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