Who Knew? Episode 453 - ANIMAL MIGRATION
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Animal Migration
Fri, Jan 20, 2012
Who Knew? 1:48 | 1,550,335 views
Many types of fish, mammals, and insects make amazing annual voyages -- sometimes traveling thousands of miles. The record for longest migration of all, though, belongs to a tiny bird.
Germiest Places
Thu, Jan 19, 2012
Who Knew? 1:25 | 368,537 views
Too much cash can be unhealthy: 94 percent of $1 bills carry germs. Gas pumps, ATMs, mailboxes, and shopping cars are also pathogen hot spots, but you can beat most of them just by washing your hands.
Year Of The Dragon
Wed, Jan 18, 2012
Who Knew? 1:21 | 314,626 views
A baby boom is expected in China in 2012 -- the Year of the Dragon. Many parents consider it good luck for their kids to be born now: across Asia, the dragon symbolizes wealth, wisdom, and good fortune.
Winnie The Pooh
Tue, Jan 17, 2012
Who Knew? 1:31 | 370,171 views
A.A. Milne's famous creation -- Winnie the Pooh -- was named after a toy, a teddy bear belonging to his son. From Dorothy to Alice, many beloved kids' book characters have been named for family or friends.
Manhattanhenge
Fri, Jan 13, 2012
Who Knew? 1:57 | 1,883,837 views
Who needs Stonehenge? New York has its own version of the ancient temple -- the canyons between skyscrapers that create a solar phenomenon called "Manhattanhenge" four times a year.
Secret Codes In Art
Thu, Jan 12, 2012
Who Knew? 1:45 | 562,797 views
Another year, another theory about what the Mona Lisa really means. Leonardo da Vinci's painting has intrigued scholars for centuries -- and now one graphic designer thinks he's cracked the code.
Concept Cars
Wed, Jan 11, 2012
Who Knew? 1:49 | 875,239 views
No door? No problem. New, visionary, or just plain weird, concept cars are the stars of big car industry gatherings like this month's North American International Auto Show in Detroit.
Superweapons
Tue, Jan 10, 2012
Who Knew? 1:36 | 1,523,238 views
Russia's plans for a 100-ton missile might be nothing more than politics. Death rays, superguns, and other so-called "superweapons" rarely pan out -- but when they do, it can have devastating consequences.
Howling Wolves
Mon, Jan 9, 2012
Who Knew? 1:22 | 542,740 views
Wolves howl at the moon, right? They do howl -- but at each other. The nighttime calls help packs stick together, and can carry up to six miles -- but they're far from the loudest animal cry.
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