We can be guilty of thinking that oxygen is a uniquely human need. While all land-dwelling animals breathe oxygen from the ...

The most extreme modifications occur in birds and mammals, but the beginnings of these changes can be seen in fish. These modifications revolve around change from gill to lung respiration and the ...

The outer ears that sit on the sides of your head share an unexpected genetic heritage with the gills of fish. According to research published in the journal Nature by scientists from the ...