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Why can some people smell ants?

The answer to TikTok’s latest mystery:

(Why can some people smell ants? Here’s the answer to TikTok’s latest mystery. | Popular Science)

‘A recent TikTok spurred an unusual debate across social media: Do ants smell bad?

The video that started the debate began innocently enough. The creator simply asked whether other people can smell the disgusting scent of dead ants on the sidewalk. In comments and replies, many agreed that they could, while others—a far larger number of people, it seems—had no idea that ants gave off a scent, even vehemently denying the idea. If you’re in the group that doesn’t know what ants smell like, chances are you just haven’t paid enough attention to some of your tiniest local residents.

Many common species of ants release pungent smells when they are in danger, squished, or otherwise dead, according to Clint Penick, an assistant professor at Kennesaw State University and ant researcher. The most common type of ant that people find in their homes on the East Coast and in the Midwest is called the odorous house ant, and when squished, it releases a pheromone that smells like blue cheese. This odorous chemical belongs to a group of chemical compounds called methyl ketones. It’s also produced by the Penicillium mold that grows on rotting coconuts and it’s what gives blue cheese its distinctive, pungent odor.

But that’s far from the only smelly compound ants produce. Some species, including carpenter ants, spray formic acid, a caustic chemical that smells a lot like vinegar, when they feel threatened. (Some people think that the ability to smell formic acid is genetic, like asparagus, and that might be why some people are more sensitive to this particular ant smell than others.) Citronella ants are named for the distinctive citrusy scent they often produce, and trap-jaw ants release a chocolatey smell when squished. When ants die of natural causes, they also release oleic acid, so dead ants “smell a little something like olive oil,” Penick says….’

— Via Popular Science

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The Ouroboros Steak Is Meat Grown from Your Own Cells

‘What do you taste like? You can find out by eating the Ouroboros Steak, which is a project by scientists and artists in US. After you take a cheek swab to collect cells, lab technicians use expired human blood to grow cell structures from your sample, creating meat that is, genetically, you. It’s appropriately named after the ouroboros, a mythical snake that eats its own tail….’

— Via Neatorama

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My Friend Steve

(APOD: 2020 November 17 – A Glowing STEVE and the Milky Way)

‘What’s creating these long glowing streaks in the sky? No one is sure. Known as Strong Thermal Emission Velocity Enhancements (STEVEs), these luminous light-purple sky ribbons may resemble regular auroras, but recent research reveals significant differences. A STEVE’s great length and unusual colors, when measured precisely, indicate that it may be related to a subauroral ion drift (SAID), a supersonic river of hot atmospheric ions thought previously to be invisible. Some STEVEs are now also thought to be accompanied by green picket fence structures, a series of sky slats that can appear outside of the main auroral oval that does not involve much glowing nitrogen. The featured wide-angle composite image shows a STEVE in a dark sky above Childs Lake, Manitoba, Canada…’

— Via APOD