How Did the Smallest Primates Get Such Big Eyes?

Manatees swim the calm waterways of tropical Atlantic coastlines with no worries of natural predators. Learn why humans are their only real danger -- and how we can help -- in today's episode of BrainStuff, based on this article: https://animals.howstuffworks.com/mammals/manatees.htm; https://animals.howstuffworks.com/mammals/manatees-see-underwater.htmSee omnystudio.com/listener for privacy information.

The tradition of putting diamonds on engagement rings is less than a century old, but some 80% of engagement rings in the U.S. now bear them. Learn how a cartel and an ad campaign created such a pervasive demand for diamonds in today's episode of BrainStuff, based on this article: https://money.howstuffworks.com/true-story-blood-diamonds.htm and this video: https://www.youtube.com/watch?v=IceJ-gUm-gQ. To learn more about the De Beers cartel, check out the episode of Stuff They Don't Want You To Know 'Diamonds: The Conspiracy' https://omny.fm/shows/stuff-they-dont-want-you-to-know/diamonds-the-conspiracySee omnystudio.com/listener for privacy information.

The police raid and ensuing riots at the Stonewall Inn in June of 1969 became a turning point in queer civil rights because of the larger movement that coalesced around it. Learn about its place in LGBTQIA history in this episode of BrainStuff, based on this article: https://history.howstuffworks.com/historical-events/stonewall-riots.htmSee omnystudio.com/listener for privacy information.

Tarsiers are our palm-sized primate cousins that evolved in the forests of Southeast Asia to have long limbs and huge, round eyes. Learn how we've learned about them in today's episode of BrainStuff, based on this article: https://animals.howstuffworks.com/mammals/tarsier.htmSee omnystudio.com/listener for privacy information.

This isn't just the least-fun thought experiment, it's a medical malady common enough to have its own name. Learn how internal hirudiniasis works (and why you don't need to panic if if happens to you) in this episode of BrainStuff, based on this article: https://animals.howstuffworks.com/marine-life/swallow-leech.htmSee omnystudio.com/listener for privacy information.

We know rhubarb as a tart fruit that looks like pink celery, but it also has a bulbous underground storage unit that was used medicinally for millennia -- and lets it grow in complete darkness. Learn about the pie plant (and how rhizomes work) in this episode of BrainStuff, based on this article: https://home.howstuffworks.com/rhubarb.htmSee omnystudio.com/listener for privacy information.

This marine bird carries the color of the ocean in its webbed feet, was named after an insult, and uses its excrement in creative ways. Learn about the blue-footed booby in today's episode of BrainStuff, based on this article: https://animals.howstuffworks.com/birds/blue-footed-booby.htmSee omnystudio.com/listener for privacy information.

Helen is a figure from Greek myth -- a daughter of Zeus with a mortal woman, and said to have been the most beautiful woman in the world. Learn more about her (and how she perhaps inadvertently started the Trojan War) in this episode of BrainStuff, based on this article: https://history.howstuffworks.com/history-vs-myth/helen-of-troy.htmSee omnystudio.com/listener for privacy information.

Your heart needs blood as much as any other muscle in your body, and it receives it the same way -- just a little earlier than anyone else. Learn how the coronary arteries work (and what can go wrong when they don't) in this episode of BrainStuff, based on this article: https://health.howstuffworks.com/human-body/systems/circulatory/heart-pump-blood.htmSee omnystudio.com/listener for privacy information.

Butterfly wings often come in striking, iridescent colors -- but it's not from pigments (or not entirely). Learn how microscopic structures give butterfly wings their flash in today's episode of BrainStuff, based on this article: https://animals.howstuffworks.com/insects/butterfly-colors.htmSee omnystudio.com/listener for privacy information.