Roaming the ancient seas eons ago, the megalodon shark eviscerated its prey with jaws that were 10 feet wide.
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A terrifying sight in ancient waters, the megalodon shark was once the most feared creature in the sea.
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Time dilation might seem like science fiction, but it’s not. There are astronauts circling the Earth right now who are experiencing it – though luckily nowhere near as much as Buzz Lightyear.
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Frilled sharks haven’t changed for about 80 million years! And while they may look a bit like snakes from a distance, they are actually much more similar to other sharks close up.
President William Howard Taft and his wife rode in this steam-powered automobile in 1909.
AP Photo
This technology, popular when automobiles first caught on, had a short resurgence in the 1970s.
The Moon often looks enormous when it first rises because of what is known as the Moon illusion.
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The Moon illusion is what makes the Moon look giant when you see it rising over a distant horizon. An astronomer explains what causes this awe-inspiring trick of the mind.
Pluto was recategorized from a planet to a dwarf planet in 2006.
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A curious kid asks: Why does it matter if Pluto is a planet or a dwarf planet?
Plastic trash accumulates in trees and shrubs along the Los Angeles River.
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Plastic is made from oil and natural gas, which started out as fossilized plant and animal material. But buried deep underground for millions of years, those materials changed in important ways.
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Around 200,000 years ago, people were living who were as intelligent as us.
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There’s a special type of particle called a ‘tachyon’ which would have to travel faster than the speed of light. But here’s the hitch – we can’t prove tachyons even exist.
Interior view of Polito’s Royal Menagerie, Exeter Change, Strand, Westminster, London, 1812.
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Historians aren’t sure exactly when the first zoo was built, but it’s clear humans have kept exotic animals for thousands of years.
An artist’s concept of an astronaut walking on Mars. But what would happen if the astronaut weren’t wearing a space helmet?
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Mars is the fourth planet from the Sun and one of our closest neighbors in space. But it’s not a very welcoming place for an Earthling to visit.
Don’t call them tentacles: An octopus has eight arms.
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With nine brains, blue blood and a talent for camouflage, the octopus is one of the most fascinating creatures in the sea.
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The value of digital art or other digital objects depends on how much someone is willing to pay for it.
A tornado in Turkey, Texas.
Jana Houser
You can’t photograph the inside of a twister, but radar offers some clues.
The red and stormy planet.
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The biggest storm on Jupiter is so big it could swallow all of Earth. But it’s now shrinking, and we’re not sure what that means.
The depths of the valleys on a key act like a code that must match the lock.
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A computer security expert explains how keys work – and how they are like passwords.
The Earth viewed from the Apollo 8 lunar mission on Dec. 24, 1968.
NASA
The Earth is a resilient planet, but people are altering it in ways that may take centuries to reverse.
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From fibre to fabric. The process of making textiles has been important to humans for almost 35,000 years.
The same thing that makes their eyes glow helps cats see better in dim light.
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A veterinary ophthalmologist explains what’s going on.
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Scientists have come up with a number of theories about the multiverse.