Where was the world’s first zoo?
Where was the world’s first zoo? Interior view of Polito’s Royal Menagerie, Exeter Change, Strand, Westminster, London, 1812. Heritage Images/Hulton Archives...
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What does an octopus eat? For a creature with a brain in each arm, whatever’s within reach
Don’t call them tentacles: An octopus has eight arms. TheSP4N1SH/iStock via Getty Images Plus Erin Spencer, Florida International University and...
What do tornadoes look like on the inside?
What do tornadoes look like on the inside? A tornado in Turkey, Texas. Jana Houser, CC BY-ND Jana Houser, Ohio University...
Is it possible to heal the damage we have already done to the Earth?
Is it possible to heal the damage we have already done to the Earth? The Earth viewed from the Apollo 8...
Why do flocks of birds swoop and swirl together in the sky?
Murmurations can have as many as 750,000 birds flying in unison. mikedabell/iStock via Getty Images Tom Langen, Clarkson University Why...
Deer have antlers, walruses have tusks – here’s why so few birds have weapons of their own
Deer have antlers, walruses have tusks – here’s why so few birds have weapons of their own There’s plenty of aggression...
What’s insider trading and why it’s a big problem
Gordon Gekko of ‘Wall Street’ may be the fictional face of insider trading. Ilona Gaynor/flickr, CC BY-NC-SA Alexander Kurov, West...
Why do we bleed?
Why do we bleed? A hematologist explains how the body prevents blood loss after injury The body starts plugging up wounds...
How many bones do penguins have?
How many bones do penguins have? Specialized anatomy means flightless penguins are master swimmers. Christopher Michel , CC BY-SA Julie...
What is 5G? An electrical engineer explains
Telecommunications companies around the world are expanding their next-generation, or 5G, networks. Guo Shining/VCG via Getty Images Prasenjit Mitra,...
Why can’t we throw all our trash into a volcano and burn it up?
Lava flows from a fissure in the aftermath of eruptions from the Kilauea volcano on Hawaii’s Big Island, May 22,...
How common is the ‘Common Era?’ How A.D. and C.E. took over counting years
How common is the ‘Common Era?’ How A.D. and C.E. took over counting years How common is the ‘Common Era?’ How...
Why is my poop brown?
Why is my poop brown? Brown poop can indicate good health. Vitalii Barida/iStock via Getty Images Plus Hannibal Person, University of...
