Latest articles by Marilyn Perkins
What's the longest someone has been clinically dead — but then come back to life?
When someone's heart stops beating, their brain cells start dying within minutes. But sometimes, they can still come back from the dead.
Heart quiz: What do you know about the body's hardest-working muscle?
Get pumped up — it's time to show off your knowledge about the heart.
Do figs really have dead wasps in them?
Does every fig you eat really have a dead wasp inside?
What's the hottest temperature the human body can endure?
Researchers believe there's an upper limit to the temperature the human body can withstand — but many people could face deadly health problems before reaching that threshold.
Which animal has the best hearing?
Ranking who has the best ears in the animal kingdom is a tough task, but some animals push the limits of hearing far beyond what humans can imagine.
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.
