Science ❯ Biology

Reproduction

Asexual Reproduction Parthenogenesis Sexual Reproduction Animal Behavior Egg Development Embryo Transfer Gestation Assisted Reproduction Artificial Reproduction Live Birth Dinosaur Reproduction Oviparity Mating Behavior Embryology In Vitro Fertilisation Egg-laying Wildlife Breeding Shark Reproduction Nesting Behavior Mammalian Reproduction Mating Strategies Virgin Birth Vegetative Reproduction IVF Sex Chromosomes Species Adaptation In Vitro Fertilization (IVF) Animal Reproduction Hybridization Cicada Lifecycle

New Fossils and Geochemistry Redraw Origins of Complex Life

The studies recast when and where complex cells and early animals arose by linking early mitochondrial energy gains to oxygenated seafloors, locating animal movement and sex in deep marine settings.

First Confirmed Egg From a Mammal Ancestor Found in 250-Million-Year-Old Fossil

Big Bear Eagles Jackie and Shadow Enter Pip Watch as Hatching Window Opens

Brazilian Rainbow Boa at U.K. College Has Second Virgin Birth

Serial Mouse Cloning Fails After 58 Generations as Mutations Pile Up

Serial Mouse Cloning Fails at 58th Generation, Study Finds

UK Zoo Reports Rare 'Virgin Birth' as Female Iguana Produces Eight Hatchlings

Philadelphia Zoo Unveils 16 Critically Endangered Galápagos Tortoise Hatchlings From Century-Old Pair

Denver Zoo Announces Arrival of Four African Lion Cubs

Valkyries Secure Giant Violet Egg Indoors With 24-Hour Livestream

Fertile Mice With Two Fathers Produce Their Own Offspring