Sperm: 15 crazy things you should know
Sperm Wear Hard Hats
You might not call sperm dapper, but they do wear hats.
Well, not really a hat but an oval-shaped structure called the acrosome. It contains strong chemicals that are released once the sperm attaches to the egg. The chemicals melt the egg's outer surface, drilling a hole so that the sperm can penetrate the egg to release its genetic cargo.
Credit: istockphoto
