Featured in blood

How to make sure your leech bite doesn’t kill you
The FDA’s gay and bi blood-donor ban isn’t just stigmatizing—it’s also likely outdated
Animal Crossing’s most elusive fish has a bizarre real-life backstory
Four essentials you can donate to help healthcare workers fighting COVID-19
Everything you’ve ever wanted to know about donating bone marrow
Female vampire bats regurgitate bloody dinners for their starving girlfriends
Frogs in tiny taffeta shorts paved the way for human in-vitro fertilization
Horseshoe crab blood is rare but crucial for medicine, so this scientist came up with a solution
This newly discovered leech lurked in plain sight for decades
The weirdest things we learned this week: Victorian sex drugs and deadly milk injections