On today's episode of our "Ask A Physicist" series, Dr. Goldberg tackles the darker side of the universe - Dark Matter, that is. What is this curious cosmic stuff, and why should we care?
Here's the latest entry in our "ask the physicist" series. How do you find out if Schrodinger's Cat is alive or dead, for real?
One of the most popular questions from our "ask a physicist" feature was, "What happens if you're driving at the speed of light and you turn on your headlights?" The simple answer: You can't. So quit trying.
Last week the readers of io9 asked their most nagging questions about physics to a real-live physicist. The first question: What is the Universe expanding into?
This weekend you can ask a real, live physicist (me) any question you like - nothing is too stupid, or too weird. And next week, you'll get answers!
Noted time-travel expert Dave Goldberg, a physics professor at Drexel University, just saw Hot Tub Time Machine and was - disturbed. Here he explains the "egregious number of inviolable paradoxes" in the film, in an open letter to its creators.