M27: Not a Comet Credit & Copyright: Matthew T. Russell Explanation: While hunting for comets in the skies above 18th century France, astronomer Charles Messier diligently kept a list of the things he encountered that were definitely not comets. This is number 27 on his now famous not-a-comet list. In fact, 21st century astronomers would […]
[youtube=http://www.youtube.com/watch?v=V2YMfzhm8ao] 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. – The […]
[youtube=http://www.youtube.com/watch?v=oPC-isxrhTs]
