From Youtube, "The observable universe is a big place that has been around for more than 13 billion years. Up to two trillion galaxies made up of something like 20,000 billion billion stars surround our... continue reading
posted by w1ndex 3 years 9 months 2 weeks ago • 211 views • 11:41search results matching tag: number two
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YT: Two: the inside and the outside (badum tshh)! But taking a more scientific approach, do bananas actually have 5 sides like all the pub quizzes say? Dr Sally Le Page is a British evolutionary biologist... continue reading
posted by Zawash 5 years 2 months 1 week ago • 51 views • 10:07"... an educational video produced by The Computer Museum and hosted by David Neil of PBS's Newton's Apple. Join David Neil and his four young companions on an entertaining and illuminating trek through... continue reading
posted by ant 5 years 6 months 2 weeks ago • 30 views • 26:32The Lahti L-39 is a Finnish 20 mm anti-tank rifle used during the Second World War. It had excellent accuracy, penetration and range, but its size made transportation difficult. It was nicknamed "Norsupyssy"... continue reading
posted by Mordhaus 6 years 11 months 4 weeks ago • 140 views • 10:14YouTube: I came across these four physics puzzles over the years in discussions with Neil deGrasse Tyson (riddle 4: which part(s) of a moving train are going backwards with respect to the ground?), Simon... continue reading
posted by PlayhousePals 7 years 1 month ago • 1,232 views • 4:24I invented the Bow Blower, a combination of the bow drill and forge blower to make a device that can force air into a fire while being easy to construct from commonly occurring natural materials using... continue reading
posted by Mordhaus 7 years 9 months 2 weeks ago • 1,388 views • 4:32Why can we find geometric shapes in the night sky? How can we know that at least two people in London have exactly the same number of hairs on their head? And why can patterns be found in just about any... continue reading
posted by Mordhaus 7 years 12 months ago • 136 views • 4:36"View full lesson: http://ed.ted.com/lessons/how-many-ways-can-you-arrange-a-deck-of-cards-yannay-khaikin . One deck. Fifty-two cards. How many arrangements? Let's put it this way: Any time you pick... continue reading
posted by ant 1 decade 1 month 1 week ago • 25 views • 3:42- 1