Have you ever wondered how the delicate structures hidden deep within your ears first came to be? It’s astonishing to think ...

Imagine tracing your family tree not just to distant ancestors, but to creatures that once swam in primordial seas and hopped ...

As Sharma and her team found, cartilaginous fish with jaws, such as the skate embryos they studied, do develop these joints, while jawless fish, such as lampreys and hagfish, lack them.

One of the fish’s advantages is clear—literally. Because embryos are transparent and develop outside the mother’s body, scientists can manipulate genes to model human diseases and directly ...

Zebrafish Embryo - Dr. Philipp Keller and Raghav K. Chhetrii Janelia Research Campus, Howard Hughes Medical Institute / Ashburn, Virginia, USA / Spatially isotropic whole-animal functional imaging ...

Using fossils, embryos and genes, he reveals how our bodies are the legacy of ancient fish, reptiles and primates — the ancestors you never knew were in your family tree.

The PHS Policy covers all live vertebrate animals. If an embryo hasn't hatched yet, or an early-larval-stage fish hasn't used up its yolk sac yet, is it not still a vertebrate animal? My facility ...

A new study, published today (December 10) in PNAS, reveals that fluoxetine, a commonly used antidepressant that goes by the brand name Prozac, can alter hormone levels and blunt stress responses in ...