Genetic diversity is essential to the survival of a species. It's easy enough to maintain if a species reproduces sexually; an egg and a sperm combine genetic material from two creatures into one, ...

The way that Earth's first animals reproduced held back life's diversity for millions of years, until stress and competition ...

Living organisms have good reason for engaging in sexual, rather than asexual, reproduction according to scientists. Living organisms have good reason for engaging in sexual, rather than asexual, ...

Not all creatures need to breed to produce offspring. Animals like zebra sharks and killifish are redefining what scientists thought they knew about asexual reproduction. Among vertebrates, or animals ...

(Santa Barbara, Calif.) Why are most organisms sexual? The question of why most species reproduce sexually and others reproduce asexually has stymied biologists for years (particularly since asexual ...

In the course of evolution, animals have repeatedly shifted from sexual to asexual reproduction. The first evidence of the consequences of parthenogenesis – a type of asexual reproduction – on genome ...

Scientists say Earth's earliest animals reproduced by cloning themselves, a strategy that limited competition and slowed ...

All-female species have been long thought of as evolutionary dead ends – but one fish has defied the odds to live without ...

Long-imperiled birds offer scientific breakthrough after genetic testing highlights rare phenomenon The California condor is the largest flying bird in North America, with a 10ft wingspan that enables ...

Scientists who study how organisms reproduce know that asexual reproduction is more efficient for one thing, it’s about twice as fast as sexual reproduction, since every offspring can produce more.