It's a typical day for Rex Dexter...
...starting off with a fascinating "flashback" to Rex's childhood and a look at what science at the time said the origin of the Earth was!
Rex's friend blows up a planet!
A fragment of that world crashes on Earth!
Somehow, evolution speeds up on that fragment and creatures soon migrate to the surrounding area, attacking people!
Rex and the military manage to stop the aliens!
Our lesson for today, kiddies: "We created a planetm but it nearly destroyed all of Mankind! That was a close call!"