Off the western Australian coast, in Shark Bay, a field of seagrass big enough to cover Washington, DC, has flourished for more than four millennia, a new study finds.

Geckos injected with neural stem cells modified to block cartilage growth developed the skeletal and nervous components normally lacking from regrown tails.

Many dominant T cell variants decline during pregnancy and reappear afterward, possibly explaining why relapses of the autoimmune disease are less common when women are expecting.

Owner Huang Yu dug up his deceased cat to give its cells to the pet-cloning company Sinogene.

Researchers edited macaque embryos to induce symptoms of sleep disorders and chose one animal to clone. A bioethicist questions the study’s appropriateness.

Research suggests that the invasive, all-female Procambarus virginalis originated in a German aquarium back in the 1990s.

The approach, which has never before been successfully attempted in primates, could lead to improved animal models for human biology and disease.

More lessons from Dolly the sheep

The animals, some of which were cloned from the same tissue as Dolly, appeared as healthy as non-cloned sheep, a study suggests.

Deep-sea rangeomorphs that lived more than 540 million years ago used two methods of reproduction, according to a study of fossils.

Researchers develop several thousand haploid human cell lines, each with a different gene mutant.

Coral embryos broken apart by waves can continue developing into adult clones.

The colorful and fragile start to the life of a living reef