Rounded pebbles discovered by the Curiosity rover were carried some 30 kilometres from their source by a flowing river on the red planet, a new study concludes.
The research, reported in the journal Nature Communications, provides some of the most compelling evidence yet that Mars had long periods of warm climate, allowing flowing rivers to move material tens of kilometres downstream.
The findings are based on new experiments that show the shape of a pebble can be used to accurately determine how far it has been transported across a planet's surface.
"The thing that's absolutely remarkable is that we can make observations from space, send a rover there, and by looking at individual particles, actually determine — from their shapes — how far they've moved," said one of the study's authors, Professor Douglas Jerolmack of the University of Pennsylvania in Philadelphia.
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Rob Kall is an award winning journalist, inventor, software architect,
connector and visionary. His work and his writing have been featured in the New York Times, the Wall Street Journal, CNN, ABC, the HuffingtonPost, Success, Discover and other media.
Check out his platform at RobKall.com
He is the author of The Bottom-up Revolution; Mastering the Emerging World of Connectivity
He's given talks and workshops to Fortune
500 execs and national medical and psychological organizations, and pioneered
first-of-their-kind conferences in Positive Psychology, Brain Science and
Story. He hosts some of the world's smartest, most interesting and powerful
people on his Bottom Up Radio Show,
and founded and publishes one of the top Google- ranked progressive news and
opinion sites, OpEdNews.com
more detailed bio:
Rob Kall has spent his adult life as an awakener and empowerer-- first in the field of biofeedback, inventing products, developing software and a music recording label, MuPsych, within the company he founded in 1978-- Futurehealth, and founding, organizing and running 3 conferences: Winter Brain, on Neurofeedback and consciousness, Optimal Functioning and Positive Psychology (a pioneer in the field of Positive Psychology, first presenting workshops on it in 1985) and Storycon Summit Meeting on the Art Science and Application of Story-- each the first of their kind. Then, when he found the process of raising people's consciousness and empowering them to take more control of their lives one person at a time was too slow, he founded Opednews.com-- which has been the top search result on Google for the terms liberal news and progressive opinion for several years. Rob began his Bottom-up Radio show, broadcast on WNJC 1360 AM to Metro Philly, also available on iTunes, covering the transition of our culture, business and world from predominantly Top-down (hierarchical, centralized, authoritarian, patriarchal, big) to bottom-up (egalitarian, local, interdependent, grassroots, archetypal feminine and small.) Recent long-term projects include a book, Bottom-up-- The Connection Revolution, debillionairizing the planet and the Psychopathy Defense and Optimization (more...)