The modification of three babies’ genes by He Jiankui drew widespread criticism from scientists.

From bubbling plants to endangered whales, here are some amazing images from The Scientist in 2019.

Extended pluripotent stem cells from mice can self-organize to form blastocyst-like structures called blastoids that enable a closer look at early mammalian development.

The researchers aim to grow transplantable human organs from primate embryos.

In a species of freshwater turtle, embryos can move toward warmer or cooler environments within the egg and thus help choose their sexual destiny, but not all experts are convinced.

After the reported birth of CRISPRed babies in China, experts want to take time to consider the scientific, social, ethical, and philosophical consequences of editing heritable human DNA.

The extremely rare event, thought to be caused by two sperm cells fertilizing the same egg simultaneously, was last reported in 2007.

To study the fate of stem cells in developing chick embryos, researchers trace their steps over time.

A bright blue stain highlights the sensory nerves of a developing mouse embryo.