After years of trial and error, scientists have finally done something incredible: They have successfully grown human stem cells in a pig embryo. Why would anyone do this? Turns out, many ...

While the exterior of vertebrate bodies appears bilaterally symmetrical, internal organ positioning and morphology frequently exhibit left-right (L-R) asymmetries. In several vertebrates, including ...

Long before human bone ... from the same embryonic tissue,” Dardano said. “Developmentally, it makes sense. We have all those tissues developing simultaneously and they [follow] a specific pattern ...

"This is the first human organ model of its kind that combines all tissues according to development in the embryo," says the stem cell biologist. "Our study now enables other researchers to ...

Researchers may one day overcome the problem of organ shortages for transplantation by growing ... they report having grown the first human-pig chimeric embryos. The team, led by Juan Carlos Izpisua ...