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For Sissel Tolaas, even the liveliest city may be a “blandscape.” Here, the chemist shares thoughts on why, for her, smell is the most important sense.

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Biologist Carin Bondar shares videos and books about animals getting down and dirty.

Where do a zebra’s stripes, a leopard’s spots and our fingers come from? The key was found years ago — by the man who cracked the Enigma code.

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Journalist James Nestor explores the science of the “mammalian dive reflex,” the phenomenon by which water triggers an immediate decrease in heart rate.

This week’s haul of great comments includes thoughts on Jamila Lyiscott’s spoken word essay, the happy memory of an excellent teacher, and a shared photo of a cockroach carcass, inspired by Ed Yong’s tales of dastardly parasites.

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Pheromones are a hot topic. But as zoologist Tristram Wyatt argues, we’re not even sure that humans have them. Meanwhile, scientists have been studying these chemical signals for years in the animal kingdom — and made some extremely weird observations.