How has the inside of the Earth stayed as hot as the Sun’s surface for billions of years?
The slice you see cut out of the Earth reveals its core, depicted here in bright yellow. fhm/E+ via Getty...
Question
What causes stuttering?
The majority of children who stutter will spontaneously recover from it without intervention, but some 20% of people do not....
Why is astronomy a science but astrology is not?
Your zodiac sign – like Sagittarius, the archer – might be in the stars, but your future isn’t. scaliger/iStock via...
How are books made?
Making a book takes lots of brainstorming and writing, but there are many steps to printing it, too. sykono/iStock via...
How does a television set work?
The TV in your home is very different from the television sets of just a few years ago. moodboard/Image Source...
How can you tell if something is true? Here are 3 questions to ask yourself about what you see, hear and read
Emotions can get in the way of knowing what’s true. Elva Etienne/Moment via Getty Images Bob Britten, West Virginia University...
How a Female Erection Works
How a Female Erection Works - In this video, Jonathan from the Institute of Human Anatomy discusses how a female...
Who invented music? The search for stone flutes, clay whistles and the dawn of song
Something people today have in common with civilizations past: a love of music. peepo/E+ via Getty Images Laura Dallman, University...
Why does money exist?
Cash is pretty convenient. Dilok Klaisataporn/EyeEm via Getty Images M. Saif Mehkari, University of Richmond Curious Kids is a series...
How do ants crawl on walls? A biologist explains their sticky, spiky, gravity-defying grip
Walking vertically – or even upside down – is a piece of cake for ants. pecchio/iStock via Getty Images Plus...
Why are some people mosquito magnets and others unbothered? A medical entomologist points to metabolism, body odor and mindset
Mosquitoes need to feed on blood in order to reproduce. But how do they choose whom to feed on? boonchai...
When was talking invented? A language scientist explains how this unique feature of human beings may have evolved
Humans are the only animals that express their thoughts in full sentences. Oliver Rossi/DigitalVision via Getty Images Richard Futrell, University...
Why do hammerhead sharks have hammer-shaped heads?
A great hammerhead shark’s two eyes can be 3 feet apart on opposite sides of its skull. Ken Kiefer 2/Image...
What do molecules look like?
A nanographene molecule imaged by noncontact atomic force microscopy. Patrik Tschudin/gross3HR/Wikimedia Commons, CC BY Christine Helms, University of Richmond Curious...
Why do kids have to go to school?
The core of education is to enable young learners to be kind, giving members of society. David Brewster/Star Tribune via...
Why does the Moon look close some nights and far away on other nights?
The Moon often looks enormous when it first rises because of what is known as the Moon illusion. Roadcrusher/Wikimedia Commons,...
If plastic comes from oil and gas, which come originally from plants, why isn’t it biodegradable?
Plastic trash accumulates in trees and shrubs along the Los Angeles River. Citizen of the Planet/Education Images/Universal Images Group via...
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...
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...
