Michelle Starr

It's hard to imagine Saturn without its glorious, extensive, complicated rings. Yet, when the Cassini probe arrived to study the planet in 2004, it

Human minibrains in little vials surprised scientists by surviving a stint in low-Earth orbit.

It doesn't look a day over 4.34 billion years. (Thomas Campbell/NASA)

A plant that lived 47 million years ago in what is now Utah is like nothing that lives on planet Earth today.

They say one's trash is another's treasure, but a chunk of 'rock' used to keep a door open for decades is a treasure by pretty much any metric you might care to use.

Earth's day-night cycle is defined precisely, each a span of 24 hours before the next begins.

Earth's day-night cycle is defined precisely, each a span of 24 hours before the next begins. Such is the yardstick by which we live our lives, strictly adhering to the ticking of the clock.

An artist's impression of black holes in a globular cluster. (ESA/Hubble, N. Bartmann)

An artist's impression of the Parker Solar Probe approaching the Sun. (NASA/Johns Hopkins APL/Steve Gribben)

A glowing galaxy not far from the Milky Way has been harboring a strange, puzzling secret at its core.