The discovery points to something scientists did not expect from creatures with such small brains.

"They also wiggle their butts and hit them with their butts. They're quite aggressive little creatures." ...

Humans might show commitment with a ring, penguins offer prospective mates rocks and some beetles gift a ball of dung. Wood-feeding cockroaches show commitment with a nibble of cannibalism — and then ...

When you think of two individuals coupling up to raise and protect a family together, you might think of people or birds. But probably not cockroaches. And yet, in a paper published in Royal Society ...