This ancient arthropod blood has saved your life


Pop quiz: what is bright blue, has barely changed in the past 450 million years, and sells for $15,000 per liter? Answer: horseshoe crab blood, which is used to make sure injected drugs aren't contaminated with bacteria. Hank Green explains below. So cool! --Ryan Cooper
A free daily email with the biggest news stories of the day – and the best features from TheWeek.com
The Week
Escape your echo chamber. Get the facts behind the news, plus analysis from multiple perspectives.

Sign up for The Week's Free Newsletters
From our morning news briefing to a weekly Good News Newsletter, get the best of The Week delivered directly to your inbox.
From our morning news briefing to a weekly Good News Newsletter, get the best of The Week delivered directly to your inbox.
Ryan Cooper is a national correspondent at TheWeek.com. His work has appeared in the Washington Monthly, The New Republic, and the Washington Post.
-
5 cracking cartoons about the new Cracker Barrel logo
Cartoons Artists take on MAGA designs, real issues, and more
-
Should you downsize for retirement? Here's what to consider.
The Explainer Moving to a smaller place may seem easier, but there are also some real benefits to staying put
-
What to do if you want to move but don't want to give up your low mortgage rate
the explainer 30-year mortgage rates are currently averaging 7% — and homeowners who secured rates closer to 3% during the pandemic are reluctant to sell their homes
-
Florida erases rainbow crosswalk at Pulse nightclub
Speed Read The colorful crosswalk was outside the former LGBTQ nightclub where 49 people were killed in a 2016 shooting
-
Trump says Smithsonian too focused on slavery's ills
Speed Read The president would prefer the museum to highlight 'success,' 'brightness' and 'the future'
-
Trump to host Kennedy Honors for Kiss, Stallone
Speed Read Actor Sylvester Stallone and the glam-rock band Kiss were among those named as this year's inductees
-
White House seeks to bend Smithsonian to Trump's view
Speed Read The Smithsonian Institution's 21 museums are under review to ensure their content aligns with the president's interpretation of American history
-
Charlamagne Tha God irks Trump with Epstein talk
Speed Read The radio host said the Jeffrey Epstein scandal could help 'traditional conservatives' take back the Republican Party
-
CBS cancels Colbert's 'Late Show'
Speed Read 'The Late Show with Stephen Colbert' is ending next year
-
Shakespeare not an absent spouse, study proposes
speed read A letter fragment suggests that the Shakespeares lived together all along, says scholar Matthew Steggle
-
New Mexico to investigate death of Gene Hackman, wife
speed read The Oscar-winning actor and his wife Betsy Arakawa were found dead in their home with no signs of foul play