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FFreeThinker2
Evolution - The first four billion years
(1 month ago)
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FFreeThinker2
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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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.
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- 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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FFreeThinker2
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).
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Science & Reason: http://tinyurl.com/ScienceReason
Lost Between Immensity And Eternity - Best of Carl Sagan's Cosmos (Part 2).
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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
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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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FFreeThinker2
The NASA interactive multimedia timeline traces the search for extrasolar planets, from ancient philosophical speculation to modern discoveries.
(2 months ago)
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Exoplanet Exploration: NASA PlanetQuest Historic Timeline
The NASA interactive mul...
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Science & Reason on Facebook: http://tinyurl.com/ScienceReason
Exoplanet Exploration: NASA PlanetQuest Historic Timeline
The NASA interactive multimedia timeline traces the search for extrasolar planets, from ancient philosophical speculation to modern discoveries.
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• http://www.youtube.com/Best0fScience
• http://www.youtube.com/ScienceMagazine
• http://www.youtube.com/ScienceTV
• http://www.youtube.com/FFreeThinker
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Exoplanet Exploration: Planet Quest Key Milestones
• 450 B.C.: Greeks ponder the existence of other worlds
• 1750: Wright describes the Milky Way as a massive disk of stars
• 1992: Woszczan and Frail discover rocky planets
• 1995: Mayor and Queloz find a planet at 51 Pegasi
• 1999: First transiting exoplanet observed
• 2005: Spitzer observed direct light from an exoplanet
• 2008: First visible-light exoplanet images released
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Are we alone? Searching for Earthlike Worlds
For centuries, human beings have pondered this question. Medieval scholars speculated that other worlds must exist and that some would harbor other forms of life. In our time, advances in science and technology have brought us to the threshold of finding an answer to this timeless question.
The recent discovery of numerous planets around stars other than the sun confirms that our solar system is not unique. Indeed, these "exoplanets" appear to be common in our galactic neighborhood.
The exoplanets we have discovered so far are giants, like Jupiter and Saturn. They are unlikely to support life as we know it. But some of these planetary systems might also contain smaller, terrestrial planets like Mars and Earth.
Over the next 15 years, NASA is embarking on a bold series of missions to find and characterize new worlds. These will be the most sensitive instruments ever built, capable of reaching beyond the bounds of our own solar system.
The Keck Interferometer combines the light of the world's largest optical telescopes, extending our vision to new distances. Using a technique known as interferometry, the Keck will study dust clouds around stars where Earthlike planets may be forming.
NASA's Kepler Mission, scheduled to launch in 2009, will survey our region of the Milky Way galaxy to detect and characterize hundreds of Earth-size and smaller planets. It will tell us whether planets like Earth are common or rare in our galaxy.
SIM PlanetQuest, to follow Kepler, will measure the distances and positions of stars with unprecedented accuracy. SIM's precision will allow us to locate planets in the habitable zones around nearby stars.
Finally, the Terrestrial Planet Finder will build upon the legacy of all that have gone before it. With an imaging power 100 times greater than the Hubble Space Telescope, the Terrestrial Planet Finder observatories will provide the first photographs of nearby planetary systems.
We will analyze the atmospheres of these distant worlds, looking for carbon dioxide, water and ozone. The substantial presence of all three gasses would suggest that life is present. Such a discovery would at last provide convincing evidence that we are not alone. We will have found another Earth.
Follow the history of planet hunting from science fiction to science fact with NASA's PlanetQuest Historic Timeline at http://planetquest.jpl.nasa.gov/timel...
The interactive PlanetQuest web feature, developed by JPL, conveys the story of exoplanet exploration through a rich tapestry of words and images spanning thousands of years, beginning with the musings of ancient philosophers and continuing through the current era of space-based observations by NASA's Spitzer and Kepler missions. The timeline highlights milestones in culture, technology and science, and includes a planet counter that tracks the pace of exoplanet discoveries over time.
• More information about exoplanets and NASA's planet-finding program: http://planetquest.jpl.nasa.gov
• 3D New Worlds Atlas - A visual guide to exoplanets: http://planetquest.jpl.nasa.gov/atlas...
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Related videos:
NASA/Spitzer Hidden Universe (Episode 4): Night And Day On An Alien World
• http://www.youtube.com/watch?v=tvOq2b...
NASA/Spitzer Hidden Universe (Episode 16): The X-Planets
• http://www.youtube.com/watch?v=8WXbVi...
Hubblecast 12: An Extrasolar Planet's Atmosphere
• http://www.youtube.com/watch?v=VDmvr4...
Hubblecast 14: Organic Molecules On Extrasolar Planets
• http://www.youtube.com/watch?v=Lxs9Pm...
ESOcast 11: Exoplanets Galore - 32 New Extrasolar Planets Found
• http://www.youtube.com/watch?v=UcJuhE...
ESOcast 18: Exoplanet Caught On The Move
• http://www.youtube.com/watch?v=JDTXno...
The Webb Space Telescope (JWST): Finding Earth-like Planets
• http://www.youtube.com/watch?v=r8eYB_...
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FFreeThinker2 uploaded a new video
(2 months ago)
Science & Reason on Facebook: http://tinyurl.com/ScienceReason
MSNBC Countdown, 08/16/10, Keith Olbermann Special Comment: There Is No 'Ground Z...
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MSNBC Countdown, 08/16/10, Keith Olbermann Special Comment: There Is No 'Ground Zero Mosque'
The "Ground Zero Mosque" is many things, but it is neither at Ground Zero nor is it really a mosque. So argued Keith Olbermann during Monday night's edition of "Countdown" on MSNBC.
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Ground Zero Mosque Haters K.O.'d: Keith Olbermann's brilliant 'Special Comment' about the Muslim Community Center in Manhattan, New York, erroneously called the 'Ground Zero Mosque'. In a Special Comment, Countdown's Keith Olbermann explains the misnomer and danger in calling it 'The Ground Zero Mosque.' Olbermann clarifies the misconceptions around the Cordoba House Community Center and the growing Anti-Islam hysteria.
(c) MSNBC / NBC Universal (News)
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ill gladly accept, because i want to discuss faith related issues with you , thats if you got common-sense and not prejudice and if you aint a hypocrit ok...
so yeh let me know when ever you want to have a inntelectual convo about faith.. not polotics but rather RELIGION
Do they not travel through the land, so that their hearts (and minds) may thus use REASON and their ears may thus learn to hear? Truly it is not their eyes that are blind, but their hearts which are in their breasts. [22:46]
"It is He Who has created you.... in order that you may use your reason." [40:67]
It's Reason that brings logic AND Learning:
...verily in that are Signs for those who use their REASON. [2:164], [13:4], [16:12], [16:67], [30:24], [45:5] and many more such verses.
As a believer and a Muslim, I am a free thinker.
Thanks for the invite.
If I had not studied MEDICINE , I might have been an atheist too.
By the grace of God I got guidance through my education.
Peace
destroy power, not people
namaste
Greetings
Guido