References

Latest References

Antarctica: Facts about the southernmost continent

By Nola Taylor Redd last updated

Antarctica is the coldest, windiest, and driest continent. Because so little moisture falls as rain or snow, Antarctica is classified as a desert.

Antarctica
a close-up of a chimpanzee's face

Primates: Facts about the group that includes humans, apes, monkeys and other close relatives

By Jess Thomson published

Discover interesting facts about the origins of primates, what they eat, and if they have thumbs.

Land Mammals
a firefighter walks through a burnt town

Climate change: Facts about our warming planet

By Stephanie Pappas, Marilyn Perkins published

Discover important facts about what climate change is, what's causing it, and what we can do to stop it.

Climate change

Flu: Facts about seasonal influenza and bird flu

By Mindy Weisberger published

Learn interesting facts about the flu, a viral infection that targets the respiratory system.

Flu
Global color view of Mars. A large, round, rusty-red planet. There are numerous craters all over on the planet. There is a small white circle at the top (ice cap). In the top-right quadrant of the planet there is a very large darker patch. On the bottom half there is what appears to be a long canyon that is in the shape of a smile.

Mars: Facts about the Red Planet, its moons, and possibilities for life

By Adam Mann, Brandon Specktor last updated

Discover interesting facts about Mars, its moons, its atmosphere, and the possibilities of life.

Mars

Ancient Egypt: History, dynasties, religion and writing

By Owen Jarus published

The rich history of ancient Egypt involves power struggles, amazing feats of engineering, advances in writing and art, and more.

Ancient Egyptians
a closeup of King Tut's gold mask

Ancient Egypt: Facts about the ancient civilization known for its pyramids, mummies and pharaohs

By Margherita Bassi last updated

Discover interesting facts about ancient Egypt's pyramids, mummies and pharaohs.

Ancient Egyptians
two black bears lounge in a tree

Bears: Facts about the furry omnivores that live in many parts of the world

By Marilyn Perkins published

Discover interesting facts about the different types of bears and learn why not all bears hibernate.

Bears
Green-eyed cat relaxing on a cream carpet

Cats: Facts about our feline friends

By Stephanie Pappas, Marilyn Perkins last updated

Discover interesting facts about cat intelligence, how they see the world, and why we keep them around.

Domestic Cats
Gemini meteor shower 2018 over lake in Erenhot, Inner Mongolia, China.

How to photograph a meteor shower

By Jacob Little published

Everything you need to know to photograph a meteor shower, from choosing the right time to camera settings, and some advanced techniques for creating meteor images you can be proud of.

Astronomy
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