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AtheistExperience
Evolution - The first four billion years
(1 month ago)
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AtheistExperience
Tool-making and meat-eating began 3.5 million years ago. Small-brained human ancestors used stone tools to whack into large mammals some 800,000 years earlier than previously thought.
(1 month ago)

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California Academy of Sciences: Human Evolution -- Tool use by early humans start...
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Science & Reason on Facebook: http://tinyurl.com/ScienceReason
California Academy of Sciences: Human Evolution -- Tool use by early humans started much earlier. The Academy's Zeray Alemseged reveals his latest discovery: human stone tool use dating back to 3.4 million years ago. Small-brained human ancestors used stone tools to whack into large mammals some 800,000 years earlier than previously thought.
--- Please subscribe to Science & Reason: • http://www.youtube.com/Best0fScience • http://www.youtube.com/ScienceMagazine • http://www.youtube.com/ScienceTV • http://www.youtube.com/FFreeThinker ---
- The earliest known evidence for stone tool use and meat eating among early humans is found. - The evidence -- butchered, fossilized bones -- dates to roughly 3.4 million years ago. - It's believed the ancestor Australopithecus afarensis (to which "Lucy" belongs) used the tools.
• http://news.discovery.com/archaeology...
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BBC News: Tool-making and meat-eating began 3.5 million years ago
Researchers have found evidence that hominins - early human ancestors - used stone tools to cleave meat from animal bones more than 3.2 million years ago. That pushes back the earliest known tool use and meat-eating in such hominins by more than 800,000 years.
Bones found in Ethiopia show cuts from stone and indications that the bones were forcibly broken to remove marrow. The research, in the journal Nature, challenges several notions about our ancestors' behaviour.
Previously the oldest-known use of stone tools came from the nearby Gona region of Ethiopia, dating back to about 2.5 million years ago. That suggests that it was our more direct ancestors, members of our own genus Homo, that were the first to use tools.
But the marked bones were found in the Dikika region, with their age determined by dating the nearby volcanic rock -- to between 3.2 million and 3.4 million years ago.
A battery of tests showed that the cuts, scrapes and scratches were made before the bones fossilised, and detailed analysis even showed that there were bits of stone lodged in one of the cuts.
• http://www.bbc.co.uk/news/science-env...
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Calacademy's 'Science in Action' strives to make science accessible for everyone and discuss its relevance in our everyday lives. We bring you science news through media screens and live chats on the museum floor, the Science Today website, podcasts, and monthly Nightlife programming. We gather and disseminate content through our partners, local programs, other media and Academy staff.
• http://www.calacademy.org/sciencetoday/ .
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AtheistExperience uploaded a new video
(2 months ago)
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AtheistExperience
Carl Sagan: Lost Between Immensity And Eternity (COSMOS)
(2 months ago)

Science & Reason: http://tinyurl.com/ScienceReason
Lost Between Immensity And Eternity - Best of Carl Sagan's Cosmos (Part 2).
--- Please subscrib...
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Science & Reason: http://tinyurl.com/ScienceReason
Lost Between Immensity And Eternity - Best of Carl Sagan's Cosmos (Part 2).
--- Please subscribe to Science & Reason: • http://www.youtube.com/Best0fScience • http://www.youtube.com/ScienceMagazine • http://www.youtube.com/ScienceTV • http://www.youtube.com/FFreeThinker • http://www.youtube.com/SagansCosmos ---
BEST OF CARL SAGAN'S "COSMOS":
1) 10 Years After: Carl Sagan & Ann Druyan Reflect: http://www.youtube.com/watch?v=leTNfw... 2) Lost Between Immensity And Eternity: http://www.youtube.com/watch?v=vIVsDg... 3) The Realm Of The Galaxies: http://www.youtube.com/watch?v=1axoV6... 4) Our Galaxy, The Milky Way: http://www.youtube.com/watch?v=eOazBT... 5) Our Solar System: http://www.youtube.com/watch?v=iBqjob... 6) Eratosthenes And The Round Earth Model: http://www.youtube.com/watch?v=en5UKt... 7) The Library Of Alexandria: http://www.youtube.com/watch?v=vVQs4B... 8) A Short History Of The Universe: http://www.youtube.com/watch?v=7n2r0q... 9) Artificial And Natural Selection: http://www.youtube.com/watch?v=i3uToV... 10) The Cosmic Year: http://www.youtube.com/watch?v=yFqbm_... 11) Tree Of Life - 4 Billion Years Of Evolution: http://www.youtube.com/watch?v=KF0UEC... 12) The Miracle Of Life: http://www.youtube.com/watch?v=TOyojW... 13) DNA - The Common Basis Of Life: http://www.youtube.com/watch?v=ecmuvj... 14) Abiogenesis The Origin Of Life: http://www.youtube.com/watch?v=yet1xk... 15) Astronomy vs Astrology: http://www.youtube.com/watch?v=ImaQS9... 16) Pictures In The Sky: http://www.youtube.com/watch?v=iwCAwc... 17) Ancient Astronomy: http://www.youtube.com/watch?v=H-5dwJ... 18) Triumph Of Modern Science Over Medieval Superstition: http://www.youtube.com/watch?v=8lfmRq... 19) The Mysterious Tonguska Event: http://www.youtube.com/watch?v=irVof7...
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Carl Edward Sagan, Ph.D. (1934-1996) was an American astronomer, astrochemist, author, and highly successful popularizer of astronomy, astrophysics and other natural sciences. He pioneered exobiology and promoted the Search for Extra-Terrestrial Intelligence (SETI).
He is world-famous for writing popular science books and for co-writing and presenting the award-winning 1980 television series "Cosmos: A Personal Voyage", which has been seen by more than 600 million people in over 60 countries, making it the most widely watched PBS program in history.
A book to accompany the program was also published. He also wrote the novel "Contact", the basis for the 1997 Robert Zemecki's film of the same name starring Jodie Foster.
During his lifetime, Sagan published more than 600 scientific papers and popular articles and was author, co-author, or editor of more than 20 books. In his works, he frequently advocated skeptical inquiry, secular humanism, and the scientific method.
http://www.carlsagan.com .
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AtheistExperience
Carl Sagan: It will not be we who reach Alpha Centauri
(2 months ago)

Science & Reason: http://tinyurl.com/ScienceReason
Great Minds, Great Words: We Humans Are Capable Of Greatness (Best of Carl Sagan's Cosmos, Pa...
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Science & Reason: http://tinyurl.com/ScienceReason
Great Minds, Great Words: We Humans Are Capable Of Greatness (Best of Carl Sagan's Cosmos, Part 20)
This is Carl Sagan reading from his book, "Pale Blue Dot: A Vision of the Human Future in Space". Director Michael Marantz shoots the timelapse for this piece, composes the music and edits.
"It will not be we who reach Alpha Centauri, and the other nearby stars, it will be a species very like us, but with more of our strengths and fewer of our weaknesses, more confident, far-seeing, capable, and prudent. For all our failings, despite our limitations and fallibilities, we humans are capable of greatness." (Carl Sagan)
A film by: Michael Marantz http://www.michaelmarantz.com
--- Please subscribe to Science & Reason: • http://www.youtube.com/Best0fScience • http://www.youtube.com/ScienceMagazine • http://www.youtube.com/ScienceTV • http://www.youtube.com/FFreeThinker • http://www.youtube.com/SagansCosmos ---
BEST OF CARL SAGAN'S "COSMOS":
1) 10 Years After: Carl Sagan & Ann Druyan Reflect: http://www.youtube.com/watch?v=leTNfw... 2) Lost Between Immensity And Eternity: http://www.youtube.com/watch?v=vIVsDg... 3) The Realm Of The Galaxies: http://www.youtube.com/watch?v=1axoV6... 4) Our Galaxy, The Milky Way: http://www.youtube.com/watch?v=eOazBT... 5) Our Solar System: http://www.youtube.com/watch?v=iBqjob... 6) Eratosthenes And The Round Earth Model: http://www.youtube.com/watch?v=en5UKt... 7) The Library Of Alexandria: http://www.youtube.com/watch?v=vVQs4B... 8) A Short History Of The Universe: http://www.youtube.com/watch?v=7n2r0q... 9) Artificial And Natural Selection: http://www.youtube.com/watch?v=i3uToV... 10) The Cosmic Year: http://www.youtube.com/watch?v=yFqbm_... 11) Tree Of Life - 4 Billion Years Of Evolution: http://www.youtube.com/watch?v=KF0UEC... 12) The Miracle Of Life: http://www.youtube.com/watch?v=TOyojW... 13) DNA - The Common Basis Of Life: http://www.youtube.com/watch?v=ecmuvj... 14) Abiogenesis The Origin Of Life: http://www.youtube.com/watch?v=yet1xk... 15) Astronomy vs Astrology: http://www.youtube.com/watch?v=ImaQS9... 16) Pictures In The Sky: http://www.youtube.com/watch?v=iwCAwc... 17) Ancient Astronomy: http://www.youtube.com/watch?v=H-5dwJ... 18) Triumph Of Modern Science Over Medieval Superstition: http://www.youtube.com/watch?v=8lfmRq... 19) The Mysterious Tonguska Event: http://www.youtube.com/watch?v=irVof7... 20) We Humans Are Capable Of Greatness http://www.youtube.com/watch?v=mTumUJ...
---
Carl Edward Sagan, Ph.D. (1934-1996) was an American astronomer, astrochemist, author, and highly successful popularizer of astronomy, astrophysics and other natural sciences. He pioneered exobiology and promoted the Search for Extra-Terrestrial Intelligence (SETI).
He is world-famous for writing popular science books and for co-writing and presenting the award-winning 1980 television series "Cosmos: A Personal Voyage", which has been seen by more than 600 million people in over 60 countries, making it the most widely watched PBS program in history.
A book to accompany the program was also published. He also wrote the novel "Contact", the basis for the 1997 Robert Zemecki's film of the same name starring Jodie Foster.
During his lifetime, Sagan published more than 600 scientific papers and popular articles and was author, co-author, or editor of more than 20 books. In his works, he frequently advocated skeptical inquiry, secular humanism, and the scientific method.
http://www.carlsagan.com . .
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