New work upends understanding of how blood is formed

The origins of our blood may not be quite what we thought. Using cellular "barcoding" in mice, a groundbreaking study finds that blood cells originate not from one type of mother cell, but two, with potential implications ...

Genes are switched on in the human embryo from the get-go

The finding that some genes are active from the get-go challenges the textbook view that genes don't become active in human embryos until they are made up of four-to-eight cells, two or three days after fertilization.

Embryonic cells sense stiffness in order to form the face

Cells in the developing embryo can sense the stiffness of other cells around them, which is key to them moving together to form the face and skull, finds a new study by UCL researchers.

TRACS set the stage in flatworm regeneration

People who fish and regularly use earthworms as bait may be familiar with the animal's ability to regenerate a head or tail when cut in two. Yet while impressive, an earthworm's regenerative capacity is child's play compared ...

Researchers generate human-monkey chimeric embryos

Investigators in China and the United States have injected human stem cells into primate embryos and were able to grow chimeric embryos for a significant period of time—up to 20 days. The research, despite its ethical concerns, ...

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