Did you know that nature contains clues that can uncover ancient earthquakes that occurred decades, or even centuries ago? Join us for a fascinating look into the world of ancient earthquakes, and see how yesterday's quakes compare to...

Garik Israelian is a spectroscopist, studying the spectrum emitted by a star to figure out what it's made of and how it might behave. It's a rare and accessible look at this discipline, which may be coming close to finding a planet...

Earthquakes shake a lot of things up, but after decades or even centuries, it might be a little tough to figure out when or even where one may have happened. Luckily, nature has a few ways of letting us know.

Thomson's Plum Pudding Model and Radioactivity Discovery
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Ba
ckground:
• Atoms were previously thought to be indivisible particles, as proposed b
y John Dalton.
• The discovery of the electron,...

Dr. Forrester teaches about the discoveries of radioactive isotopes by Marie Curie.