Where do parallel universes exist? Could we use wormholes to travel to them? What does time travel have to do with all this?
What is the Fermi Paradox? How rare is non-intelligent vs intelligent life? What are the challenges a species must overcome to colonize the galaxy? Where is everybody?
Are dark photons as sinister as they sound? What did the curvaton do in the early universe? And is everything really made of preons?
How can the solar corona be hotter than the surface? What has the Parker Solar probe learned so far? What do magnetic fields have to do with all this?
Are we “in range” of any potential supernovae? Has the Earth ever been hit in the past? And what about gamma-ray bursts from across the galaxy, are we safe from those?