Who come first egg or hen?

This is a classic philosophical question! Here's the breakdown:

* The Scientific Answer: The egg came first. Chickens evolved from other bird species. A bird that wasn't quite a chicken laid an egg, and from that egg hatched a chicken. So, the first chicken hatched from an egg laid by a non-chicken ancestor.

* The Catch: The question is often phrased to be a bit tricky. If we define "hen" as a female chicken, then we're stuck in a loop. A chicken can only lay a chicken egg. But, the very first chicken *had* to hatch from a non-chicken egg.

It's all about perspective and definition!