Latest articles by Marilyn Perkins
Can you dream during non-REM sleep?
People report vivid dreams during rapid-eye-movement sleep. But is this sleep stage really the only time we dream?
What are the largest rainforests in the world?
Rainforests are home to half of the world's plant and animal species. Here are the five largest rainforests in the world.
Why do cats hate water?
It's a well-known fact that most cats despise getting wet. But why?
Why do cats like concrete slabs?
Cat owners have noticed their pets seem to go crazy for concrete blocks. Why?
Why are so many men color-blind?
About 1 in 12 men is color-blind. Why doesn't this condition affect women as often?
14 of the biggest birds on Earth
Reference From 9-foot tall ostriches to albatrosses with gargantuan wingspans, here are some of the biggest birds in the world.
Echidnas: Facts about spiky Australian mammals that lay eggs
Discover interesting facts about echidnas, the strange platypus relative with spines, spurs and a pouch.
Are cats the only animals that purr?
Everyone knows what a happy cat sounds like. But are they the only animals that purr?
What are whole-body MRIs, and are they worth the hype?
Whole-body MRI scans have risen to prominence for their alleged ability to catch many health conditions early. But are they legit?
What animal has the best eyesight?
When it comes to exceptional eyesight, picking a clear winner is harder than you might think.
Crows: Facts about the clever birds that live all over the world
Discover interesting facts about how crows remember faces, mimic human speech and more.
How do migrating birds know where they're going?
To navigate the skies, birds rely on a complex sensory tool kit.
The sun: Facts about the bright star at the center of the solar system
Discover interesting facts about the sun, the solar system's central star that supports all life on Earth.
Can adults grow new brain cells?
Scientists are still debating whether the human brain is capable of growing new cells past childhood.
The history of cat domestication
Discover the history of our feline friends, and learn about the debate over whether cats are really "domesticated" at all.
Do parrots actually understand what they're saying?
Parrots are prolific vocal learners. But do they actually understand the words they say?
The moon: Facts about our planet's lunar companion
Discover interesting facts about how the moon formed, what it's made out of, and the many missions humans have launched to explore it.
Quantum computing: Facts about the ultra-powerful computers that use quantum mechanics
Discover interesting facts about quantum computers, how they differ from classical computers, and what sort of fields they'll be used in.
When was beer invented?
Humans discovered fermentation thousands of years ago, but ancient brews would have tasted much differently from the beers of today.
Jupiter: Facts about the biggest planet in our solar system
Discover interesting facts about Jupiter, its many moons, and whether the gas giant and its moons could host extraterrestrial life
Saturn: Facts about the ringed planet
Discover interesting facts about Saturn, its rings and whether it could contain extraterrestrial life.
What's the oldest known recipe?
Cooking is an essential part of human culture, but people haven't always written down recipes the way we do now.
