How does gravity bend the path of light? Does it seriously act like a lens or is that just a metaphor?

How does gravity bend the path of light? Does it seriously act like a lens or is that just a metaphor?
Have we figured out dark matter? No. Oumuamua won’t stay boring, year in review with special guest Johnny DiLoretto, and of course listener questions
NASA wants to return something from Mars…almost, NASA gets a new direction, a supermoon rant, and of course listener questions!
What strange creatures inhabit the so-called “particle zoo”? Why is it a zoo instead of something simpler?
All planets with liquid water please raise your hand, don’t go chasing interstellar asteroids, and of course listener questions!
A guide to the winter sky and questions about the science of sci-fi with special guest Michael Solomon.
SpaceX engines catches fire (in the wrong way), naming a frozen rock, and of course answers to your questions!