biology
Animals
Scientists Record an Extremely Intimate Look at How Dolphins Get It On
Researchers used a CT scanner to watch how dolphins' oddly shaped junk fits together during sex.... READ ON
Medicine
A Common Steroid May Have the Potential to Treat PTSD
The drug manipulates the expression of a specific gene associated with the disease.... READ ON
Animals
Tardigrades Produce Glass Shields to Survive Extreme Conditions
These microscopic monsters just get weirder and weirder.... READ ON
Design
These Ties Are Made of Spider Silk
Only 50 people will get to wear them, though.... READ ON
Science
We're Not Alone: Itching is Contagious for Mice Too
How do sensations like feeling itchy spread among social animals? Researchers at the Center for the Study of the Itch are looking into it.... READ ON
Videos
Why a Person's Second Toe Is Sometimes Longer Than Their Big Toe
If your second toe is longer than your big toe, don't worry about it! You and your toes are completely normal.... READ ON
The Body
5 Muscles You Might Be Missing
You're probably aware of some vestigial body parts, like wisdom teeth, that the human body doesn't really need. But did you know there are several muscles in that category as well?... READ ON
Weird Science
How To See Colors That Don’t Exist
Turns out there are six of them.... READ ON
Videos
Peacock Feathers Are Even More Majestic Under a Microscope
Photographer Waldo Nell captures the iridescent beauty of peacock feathers under the microscope. His work transforms a familiar object into abstract landscapes and still lifes. We hope you’ll enjoy the stunning result.... READ ON
Weird
Family Cracks Open Chicken Egg to Find Another Egg Inside
The phenomenon is rare but not unheard of.... READ ON
Videos
Why Do We Close Our Eyes When We Sneeze?
We don't actually have a definitive answer as to why, but hit play for the best guesses that research gives us.... READ ON
The Body
How Our Eyes See Everything Upside Down
So why doesn’t the world look that way?... READ ON
Science
The Global Biodiversity Atlas Reveals the Secrets of Soil
There’s a lot of life under our feet—and now we can appreciate that more than ever.... READ ON
Science
Scientists Track Microbe Transmission from Mother to Infant
“We know the infant increases [its] microbial diversity after birth and will continue doing so until being an adult,” senior study author Nicola Segata tells mental_floss. “We needed to understand from where microbes are coming in the first place.”... READ ON
Medicine
Scientists Use Stem Cells to Regenerate Layers of a Human Heart
A recent study from Penn State details how researchers coaxed ordinary skin cells to grow into heart cells.... READ ON
Miss Cellania
5 Strange Microbes (and 1 Bonus Organism)
The world is teeming with life, and we're always discovering new species—including some that stretch the limits of how we view and classify biological life forms. Here are a few that clearly don't play by the rules.... READ ON

The Arctic gets its name from the Greek word for "bear" (arctos) because of its proximity to the constellation "Ursa Major" ("great bear" in Latin).

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