Biology
How Falling Cats Taught Telescopes to Spin
How do cats always land on their feet? Discover the fascinating physics of falling felines and how their mid-air twists inspired space telescope engineering.
Topic
Space
A collection of essays to explore, one idea at a time.
Essays
Newest first
Physics
The 100,000-Year Journey of Sunlight to Your Skin
We're told sunlight takes 8 minutes to reach Earth. But the true journey of a photon from the Sun's core to your skin actually takes over 100,000 years.