Between 280 and 200 million years ago, a group of animals evolved which would eventually give rise to mammals, including ...

A 250-million-year-old fossil from Africa reveals that early mammal ancestors laid eggs, offering insight into their survival ...

You can’t make a mammal-ette without laying some eggs. The duck-billed platypus wasn’t the only mammal to lay eggs. Analysis of a fossil in South Africa proves that our mammalian ancestors were ...

Some of the most ancient fossils collected to date were traced back to the Ediacaran period. This is the time interval ranging from around 635 to 541 million years ago, shortly before the time when ...

A remarkable new discovery is shedding light on one of the greatest survival stories in Earth's history, and answering a ...

Scientists discover the first fossil egg of a mammal ancestor, offering new clues to how Lystrosaurus survived extreme ...

Researchers at Kenya’s Ol Pejeta Conservancy witnessed a biological breakthrough recently when a southern white rhinoceros successfully became pregnant through an artificial embryo transfer for the ...

NEW YORK (AP) -- It may be futile to try producing stem cells by putting human DNA into cow or rabbit eggs and making hybrid cloned embryos, a strategy that triggered controversy recently in Britain, ...

LONDON (Reuters) - Creating hybrid human/animal embryos to help develop new treatments for disease would not be illegal in Britain but should be put to a public debate, a regulatory body said on ...

LONDON (Reuters) - British regulators decided on Wednesday to permit in principle the creation of hybrid human-animal embryos for research into illnesses such as Parkinson's, Motor Neurone Disease and ...

Destructive Human Embryonic Stem Cell Research—The term “destructive human embryonic stem cell research” means any research that involves the disaggregation of any human embryo for the purpose of ...

IVF, cryopreservation, and surrogacy are helping preserve genetics and rebuild endangered populations. Most people support these technologies, but only with strong welfare protections and transparency ...