OMG science
fromwww.scientificamerican.com
1 day agoThe wild science of octopus sex
Male octopuses use a specialized arm to sense female hormones for mating, compensating for the lack of vision during reproduction.
Most Americans think of turkeys in November, but for wild turkeys, the real drama unfolds in spring, when breeding season transforms forests and fields into complex social arenas filled with high-stakes courtship. During this time, male turkeys, or toms, display a striking combination of physical traits and behaviors to attract females, including gobbling calls, fanned tails, sharp spurs, hair-like beards on their chests, and the elongated snood draping over their beak, which research shows is a key factor in female choice.
The spotted ratfish is a two-foot-long fish with a big head and a long, skinny tail that lives in the northeastern Pacific Ocean. It belongs to a group of fish called chimaeras that are closely related to sharks. (Chimaeras are sometimes called ghost sharks.) Like most vertebrate creatures, it has teeth in its mouth. Unlike other vertebrates it also has teeth in another location: its forehead. It uses these forehead teeth for sex.