JPL and the Space Age: The Hunt for Space Rocks

Asteroids and comets are among the oldest objects in our solar system. They mostly reside at safe distances from Earth, but some find their way into our planetary backyard. Every day, the Earth receives visitors from outer space: tons of space debris that mostly goes unnoticed. Some of these "shooting stars," however, do survive the fiery descent through the atmosphere. That's what happened to the dinosaurs 65 million years ago when a massive asteroid - or comet - struck Earth.

Courtesy of NASA Jet Propulsion Laboratory on YouTube. Watch on YouTube ↗

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