Cockroaches, like humans, tend to be right-handed. Cockroaches aren't the only animals to display "handedness," though. Horses have been shown to be largely right-hoof dominant, and parrots, lobsters, owls and monkeys all show some kind of asymmetrical dominance.
More facts about cockroaches:
- Young cockroaches can squeeze through a hole the thickness of a dime. Older ones need up to a quarter's thickness of space to squeeze through.
- Female cockroaches mate only once in their lifetime, but after that, they're pregnant for the rest of their lives.
- Cockroaches that have just shed their skin are white with black eyes. It takes them up to eight hours to regain their normal shell coloring.