References

reference Centrifugal and centripetal are two closely related forces that describe circular motion, but the meanings are often mixed up.

The woolly mammoth, a cousin of today's elephants, died out about 10,000 years ago. It may be possible to bring them back by cloning, but should we?

Discover interesting facts about how evolution works, the different patterns that can emerge from evolution, how quickly organisms can evolve, and whether evolution is a random or ordered process

Homo floresiensis, a diminutive hominin dubbed the hobbit, lived about 17,000 years ago on a remote Indonesian island.

Buying Guide Ideal for work and entertainment, these are the best laptops for students in 2024.

Everything you need to know about August's prolific display of "shooting stars."

Find one of the best laptops for coding and programming so you can work on the go with ultimate power in a portable package.

Buying Guide Looking to check out macOS? Here are the best MacBooks for students you can buy right now.

Ultraprocessed foods have been tied to various health risks — but what are they, exactly?

Cottonmouth snakes, also known as water moccasins, are venomous snakes found throughout the southeastern U.S. that can be identified by the white color in their mouths.

The Thracian gladiator Spartacus, a popular character in movies and television, outsmarted the Romans until his demise in the first century B.C.

Neanderthals are an extinct group of hominins that emerged around 400,000 years ago and died off around 40,000 years ago. They are our closest known relatives and interbred with Homo sapiens.

The history of video games goes back decades — dating back to the dawn of computing itself.

Here are Denisovan facts about their discovery, where and when they lived and what we know about their appearance, genetics and culture.

The island of Rapa Nui, the most isolated inhabited landmass on Earth, is known for its massive Moai statues.

Reference We've collected some of the most interesting and amazing facts about Earth

Reference Copperhead snakes are commonly found in the eastern U.S., where they inflict more bites than any other snake species. Luckily, their venom is relatively mild and rarely deadly for humans.

Reference The world's deadliest natural disasters span more than 2,500 years of human history and include earthquakes, tsunamis and cyclones.

The ruins of Chichén Itzá in eastern Mexico were built about 1,200 years ago.