All Things Considered for October 31, 2019 Hear the All Things Considered program for October 31, 2019

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Common vampire bats (Desmodus rotundus), such as this group day-roosting in a cave in Mexico, can form cooperative, friendship-like social relationships. B.G. Thomson/Science Source hide caption

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B.G. Thomson/Science Source

Science

For These Vampires, A Shared Blood Meal Lets 'Friendship' Take Flight

Common vampire bats might drink the blood of their prey, but it turns out that these fearsome beasts can be warm and fuzzy when it comes to their fellow bats.

Common vampire bats (Desmodus rotundus), such as this group day-roosting in a cave in Mexico, can form cooperative, friendship-like social relationships. B.G. Thomson/Science Source hide caption

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B.G. Thomson/Science Source

For These Vampires, A Shared Blood Meal Lets 'Friendship' Take Flight

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During deep sleep, waves of cerebrospinal fluid (blue) coincide with temporary decreases in blood flow (red). Less blood in the brain means more room for the fluid to carry away toxins, including those associated with Alzheimer's disease. Fultz et al. 2019 hide caption

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Fultz et al. 2019

How Deep Sleep May Help The Brain Clear Alzheimer's Toxins

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Dafne Keen as Lyra (alongside her daemon Pantalaimon) in HBO's new adaptation of Philip Pullman's His Dark Materials trilogy. HBO hide caption

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HBO

'His Dark Materials' Producer Jane Tranter Stays True To The Story

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More than 300 fires broke out in Northern California over the past week, leaving residents like Danielle Bryant waiting for updates and a change in the weather. Lesley McClurg/KQED hide caption

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Lesley McClurg/KQED

For Some California Residents, Latest Wildfires Are A Tipping Point

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