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Phil Plait

Bad Astronomy

WANT Part IX: Levitating TARDIS edition

An ancient, short-faced bear, Arctodus simus, was incredibly big, at a standing height of as many as 12 feet tall. (Credit: Daniel Eskridge/Shutterstock)

An illustration of Arctodus simus, an ancient bear about 12 feet tall

What were the largest predators to live on the prehistoric planet? Meet six of the massive creatures that delivered death on ancient land, sea, and sky.

6 Ancient Mega-Predators that Once Ruled the World

Humans have had a long history with wood, though the material isn't included in the traditional three-age system that separates human history according to the favored tool and weapon-making mediums. (Credit: mrmohock/Shutterstock)

Ancient human hand resting on a wooden tree trunk

The advent of stone-, bronze-, and iron-working were all turning points in human history. But what about the working of wood? Learn more about the material ages of archaeology — and whether wood is one of them.

What Evidence Is There For a "Wood Age" to Rival Those of Stone, Bronze, and Iron?

The bodies of two supposed aliens were presented to the Mexican Congress in September 2023. With their spindly bodies and bulbous domes, the specimens are the spitting image of the quintessential alien. (Credit: Octavio Hoyos/Shutterstock)

Mexico City, Mexico September 12 2023. Mexican ufologist Jaime Maussan presented two supposed "non-human" bodies found in Peru in the Mexican Congress during a public assembly.

From strangely spherical orbs to ancient aircraft, the list of supposedly out-of-this-world objects keeps growing. Learn more about five of the most famous fake alien artifacts.

5 Alleged Alien Artifacts That Were Actually Rocks, Spark Plugs, and Dolls

Kids can learn to code with simple activities like an Hour of Code or fun games you can find on Science Near Me. (Credit: SeventyFour/Shutterstock)

Kids Coding

Coding is far easier and more fun than you might think. Find out how to get started during CSEdWeek.

Curious About Coding? Jump In During Computer Science Education Week!

In late 2020, the U.S. FDA greenlit a genetically altered pig as an allergy-safe source of food, drugs and organ transplants. (Credit: CHIRATH PHOTO/Shutterstock.)

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Transplanting animal hearts and kidneys into humans could end the dire shortage of donor organs. But researchers must still prove they can defeat the specter of long-term rejection.

Doctors Break the Interspecies Barrier to Save Lives

(Credit: Bjeayes/iStock via Getty Images Plus)

WANT Part IX: Levitating TARDIS edition

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