Reproduction

One female also managed to store sperm for at least four years and then successfully reproduce from it.

The Xenobots can self-heal, and they reproduce in an entirely different way—Xenobots build other Xenobots.

Plain pocketbook mussels flap their mantles in order to attract an unwitting larval host for their young.

Women are born with all the eggs they'll ever produce, around two million. This number steadily declines until menopause.

Women can wait up to two years to be diagnosed with the condition, a researcher looking for its cause told "Newsweek."

The research could change our understanding of the female anatomy.

Although poor reproduction rates have been known to affect individual species in the past, this is the first time such low reproductive rates have been seen at every stage of the ecosystem.

This type of mating behavior, where a generation of males die off in their first season, is very rare in the animal kingdom.

Scientists hope their theory could one day pave the way for new ways to prevent cancer.

Female jumping spiders produce fluid with four times the amount of protein found in cow's milk.

Scientists also documented bees that had three fathers and one mother.

"Nobody really knew it was possible—but it worked magnificently," the couple's fertility doctor said.

This remained true even when the gorilla cared for kids that weren't his own.

The research could one day be used to help human same-sex couples reproduce.

Scent is thought to play an import role in who we find attractive.

Researchers suggest that the older females may be seducing the males with pheromone signals.

The data for this study was actually collected nearly 20 years ago as part of a regular federal survey.

New research found that the fungus shows signs of asexual reproduction.

Researchers weren't able to DNA test the placenta to confirm that it was a humpback's.

This particular species of worm, Auanema rhodensis, has three possible sexes: male, female and hermaphrodite.

The process can lead to the creation of whole new species.

Some of this behavior may sound familiar.

Noise pollution is getting in the way of these fish's mating rituals.

Scientists used "the force."

As they age, fathers pass on more genetic mutations to their offspring than mothers.

Long-standing debate of why women become infertile many years before death edges ever closer to being solved.

The intricate design of female dolphin anatomy has been a puzzle to biologists who study reproduction. But new research shows how this design may allow females to control which males win the fertilization prize.

Scientists observed female dragonflies stopping mid-air, falling to the ground and lying motionless until the male had gone.

Side effects, drugs companies and societal roles all play their parts in holding back alternative forms of birth control.

The study has yet to be conducted on humans.