At just two-and-a-half hours old, a teensy fruit-fly embryo is bustling with activity, and now researchers have captured this development in a 3D video showing a young embryo grow into a 20-hour-old ...

For the first time, scientists have recorded a human embryo implanting into a womb in real time, a feat the researchers hope will lead to new ways to treat infertility and prevent miscarriages. "Being ...

A team of biologists and mathematicians studied hours of video to learn how insects take shape in the egg. The secret is geometry. Micrographs of various portions of cricket embryos during development ...

The TikToker said the corkscrew-shaped California horn shark egg was "pliable" and showed off the tiny, moving embryo inside.