Do All Bats Echolocate? How Different Species Use Their Senses

Bats' ability to navigate gracefully in the dark kind of seems like a superpower at first glance. Many of these flying mammals use echolocation: they emit sonar and then detect the sound waves that return after bouncing off another object. Echolocation is useful for navigation (not running into that tree up ahead) as well as finding food (zeroing in on a tasty moth fluttering nearby).

Three carved pumpkins: one with a dinosaur skull design, one with two elephants, and one with a lion.

Pumpkin Stencils: SUE, Fighting African Elephants, and a Tsavo Lion

For Halloween, give your pumpkins some natural history flair with these stencils inspired by famous Field Museum specimens. To create your pumpkin design, download and print a stencil, then cut out the yellow areas. Show us your handiwork on Twitter, Instagram, or Facebook

Chihuahua-sized fossil "beardogs" shed new light on evolution of dogs and their relatives

Fossil discoveries don’t always happen out in the field, with scientists armed with pick-axes realizing they’ve found something special. Sometimes, fossils lie in wait in museum collections until the right researcher comes along and realizes there’s something unusual about them. That’s what happened this time, and the fossils in question are prehistoric dog relatives called “beardogs.”

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