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Sean Carroll

Cosmic Variance

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(Image Credit: Sergii Figurnyi/Shutterstock)

Ancient Egyptian tomb

Artistic depictions of the Ancient Egyptian god Nut reveal an awareness of the Milky Way galaxy.

Sky Goddess Depictions Show Ancient Egyptians Were Aware of the Milky Way

Imagine a crocodile built like a greyhound — that’s a sebecid. Standing tall, with some species reaching 20 feet in length, sebecids were top predators until they went extinct during the Miocene. (Image Credit: Illustration by Jorge Machuky)


Prehistoric Crocodiles

A sebecid tooth and two vertebraes found in the Dominican Republic show that the crocodile species persisted in the Caribbean after it died out in other areas.

Prehistoric Crocodile Fossil Shows Species Went Extinct 5 Million Years Later Than Thought 

Clocks at an airport telling time from around the world

Learn about NIST-F4, the latest cesium fountain clock that now stands as one of the most accurate timekeepers in the entire world. 

New Atomic Fountain Clock Props Up the World's Time With Pinpoint Precision

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