Featured in blood
How to make sure your leech bite doesn’t kill you
You don’t know where that worm’s been … or where it will end up.
The FDA’s gay and bi blood-donor ban isn’t just stigmatizing—it’s also likely outdated
Critics say that the policy, first instated during the 1980's AIDS crisis, doesn't track with modern testing methods and social movements.
Animal Crossing’s most elusive fish has a bizarre real-life backstory
Hundreds of millions of years ago, they swam with our aquatic ancestors.
Four essentials you can donate to help healthcare workers fighting COVID-19
Supplies can be better than money.
Everything you’ve ever wanted to know about donating bone marrow
From swabbing your cheek to saving a life.
Frogs in tiny taffeta shorts paved the way for human in-vitro fertilization
They wore hot pants in the name of science.
Horseshoe crab blood is rare but crucial for medicine, so this scientist came up with a solution
The rarest blood is blue.
This newly discovered leech lurked in plain sight for decades
Researchers found a new species of medicinal leech in swamps along the eastern seaboard.
The weirdest things we learned this week: Victorian sex drugs and deadly milk injections
Our editors scrounged up some truly bizarre facts.