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Scientists discover new role of cell cycle in cilia formation

The awe-inspiring process of cell division can turn a fertilized egg into a baby—or a cancerous cell into a malignant tumor. With so much at stake, nature keeps it tightly controlled in a process called the cell cycle that ...

Video: Fly across Nili Fossae with ESA's Mars Express

Mars's surface is covered in all manner of scratches and scars. Its many marks include the fingernail scratches of Tantalus Fossae, the colossal canyon system of Valles Marineris, the oddly orderly ridges of Angustus Labyrinthus, ...

NASA astronauts practice next giant leap for Artemis

The physics remain the same, but the rockets, spacecraft, landers, and spacesuits are new as NASA and its industry partners prepare for Artemis astronauts to walk on the moon for the first time since 1972.

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