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,
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He is the author of The Bottom-up Revolution; Mastering the Emerging World of Connectivity
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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 (more...)
