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
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Florida erases rainbow crosswalk at Pulse nightclubSpeed Read The colorful crosswalk was outside the former LGBTQ nightclub where 49 people were killed in a 2016 shooting
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Trump says Smithsonian too focused on slavery's illsSpeed Read The president would prefer the museum to highlight 'success,' 'brightness' and 'the future'
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Trump to host Kennedy Honors for Kiss, StalloneSpeed Read Actor Sylvester Stallone and the glam-rock band Kiss were among those named as this year's inductees
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White House seeks to bend Smithsonian to Trump's viewSpeed Read The Smithsonian Institution's 21 museums are under review to ensure their content aligns with the president's interpretation of American history
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Charlamagne Tha God irks Trump with Epstein talkSpeed Read The radio host said the Jeffrey Epstein scandal could help 'traditional conservatives' take back the Republican Party
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CBS cancels Colbert's 'Late Show'Speed Read 'The Late Show with Stephen Colbert' is ending next year
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Shakespeare not an absent spouse, study proposesspeed read A letter fragment suggests that the Shakespeares lived together all along, says scholar Matthew Steggle
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New Mexico to investigate death of Gene Hackman, wifespeed read The Oscar-winning actor and his wife Betsy Arakawa were found dead in their home with no signs of foul play
