For the first time ever, scientists have documented the elaborate tap dancing courtship displays of cordon-bleu songbirds. Invisible to the naked eye, these birds execute their rapid-fire steps in as little as 20 milliseconds.
Watching a fringe-lipped bat swooping down to eat a tungara frog will give you a new appreciation for bats as predators. It will also give you a new appreciation for how much male frogs want to mate.
Earlier today, scientists announced they'd discovered an insect with a new kind of female sex organ. It looks a bit like a penis, and is called a gynosome. But almost every news outlet covered the story by describing the insects as "females with penises." This isn't just painfully wrong — it's bad for science.
Hipsters take note: Beards may be all the rage — and they might be making you more attractive for now — but this is a fashion trend that could ultimately be the cause of its own undoing.
It's not uncommon for males of various species to physically battle it out in an effort to win over females. But plants, because they can't move or fully sense their environment, don't partake in this reproductive process. Well, at least that's what we thought.
When scientists discovered that some dinosaurs had feathers, it completely changed our perception of what the ancient animals looked like — and pissed a lot of people off. Now, in another twist, researchers have found that the duck-billed dinosaur Edmontosaurus regalis had a fleshy crest similar to a rooster's comb.
From an evolutionary perspective, human menopause doesn’t make a lot of sense. Searching for an explantion for this somewhat uniquely human process, a group of Canadian researchers used computer models to show that menopause is an unintended outcome of natural selection — and men's sexual preferences might be to blame.
A new study by Australian researchers shows that well-endowed guys are more attractive to women — but only to a point.
Seriously, look at the size of the thing sticking out of that beetle's head, and that's not even the maximum size those things grow to. All male rhino beetles have these giant horns growing out of their heads as a way of showing off their sexual prowess to any female rhino beetles that might be around. Crazy, unwieldy…
Some traits get passed down because they help animals stay alive. Some traits get passed down because they enhance fertility. And some traits get passed down because they just make creatures more sexually attractive.
Some species share the exact same territories, rely on the exact same resources, and are sufficiently closely related that they can easily interbreed. So why don't these just merge into a single population? Because they simply don't want to interbreed.
Brain size can vary tremendously between species. For instance, the average human head holds around three pounds of cerebral matter; your typical chimp, on the other hand, packs about a third of that.
Female chickens are among the most promiscuous members of the animal kingdom, with wild and domestic fowl alike tending to mate with way more males than necessary to fertilize their eggs.
To compete for mates, male beetles often grow fierce mandibles that they use to fight other males. Unfortunately, there's a tradeoff. Researchers in Japan discovered that beetles with longer mandible weapons have smaller testicles and less ejaculate than their brethren.
Among the tiny insects known as water striders, males who aggressively attempt to mate with females don't wind up with as many offspring as their more gentlemanly counterparts. How can aggressive mating ever be a losing strategy?
Accepted scientific wisdom holds that new species arise because of geographic separation - the same bird evolves differently on two different islands. But a new study overturns this idea, challenging the importance of environment as a driver of evolution.
Seed beetles are polyandrous – females mate with multiple males, and choose which sperm will fertilize their eggs afterward. Scientists long believed they did this to get the best sperm. But a new study shows the fittest males always lose.