Here’s an important bit of astrophysics that you can use to impress your friends–the early formation of a zircon based magnetic field protected the Earth from the Solar wind and allowed retention of atmosphere and such.
Fascinating. So many coincidences that created a friendly and safe planet to live on. Right now I can sit on my porch and not be afraid of getting zapped by cosmic rays or big hungry animals.
Mostly I have to worry about meddlers and nannies.