MinutePhysics: How Long To Fall Through The Earth? (YouTube, 5 minutes)
Category Archives: Science
Do you know who Margaret Hamilton is?
Time: Remembering the Apollo 11 Moon Landing With the Woman Who Made It Happen. “Margaret Hamilton’s software got man to the moon—but she didn’t stop there.” By Lily Rothman, July 20, 2015.
Here’s Margaret Hamilton on Wikipedia.
What are Gravitational Waves?
MinutePhysics: Gravitational Waves Explained Using Stick Figures. (YouTube, 3 minutes)
Glass – liquid or solid?
Veritasium: Is Glass a Liquid? (YouTube, 7 minutes)
You might have heard the myth that very old glass windows are thicker at the bottom than at the top because glass is a liquid that flows very slowly. However, glass lenses in very old telescopes don’t show the same effect. This video explains both and the difference between solids and liquids.
“Pluto isn’t quite as lonely as scientists had thought.”
Space.com: New Dwarf Planet Discovered Far Beyond Pluto’s Orbit.
“Astronomers have discovered another dwarf planet in the Kuiper Belt, the ring of icy objects beyond Neptune. But this newfound world, dubbed 2015 RR245, is much more distant than Pluto, orbiting the sun once every 700 Earth years, scientists said.”