Phil Plait

Bad Astronomy

Darwin's Birthday?

This tardigrade is sporting a new “tattoo” — represented in this magnified image by the highlighted dots, and visible in the inset image. (Image Credit: Adapted from Nano Letters 2025, DOI: 10.1021/acs.nanolett.5c00378)

Tardigrade tattoos

Learn about the significance of tardigrades being tattooed, a process that could lay the foundation for microscopic, biocompatible devices.

Tardigrade Tattoos Could Pave the Way for Microscopic Medical Devices

Lion tooth mark on the hip bone. (Image Credit: Maynooth University)

Lion bite marks

Learn how forensic evidence confirms that gladiator and lion combat did occur, and why experts think these fights didn't just occur in Rome.

Ancient Bite Wounds Confirm Roman Gladiators Did Fight Lions in Combat

comet coming to earth

Learn about new evidence that suggests life on Earth may have started with the help of molecules that were delivered by comets and asteroids.

Molecules From Space May Have Sparked Life on Earth Billions of Years Ago

Darwin's Birthday?

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