Sex cells in male organisms are called cells.

a. sperm
b. egg

Giga is the second highest prefix on the normal scale, the first is terra.

Many archeologists and anthropologists disagree with dr. thorne's view.  thorne strongly believes that what many calls "homo erectus"  was in fact  homo sapiens,  and that they migrated out of africa almost 2 million years ago and dispersed throughout europe and asia. that's way different  from what scientists have always believed about the evolution of the species.

Any extreme heat or flames.