Shapes of beaks and snouts come in an extraordinary range of forms, reflecting adaptations to different lifestyles and ...

Mouse (left) and chicken (right) during development. Both species use conserved signaling pathways to form the craniofacial ...

Is there only one optimal configuration an organism can reach during evolution? Is there a single formula that describes the trajectory towards the optimum? And can we 'derive' it in a purely ...

Small fold – big role: A tissue fold known as the cephalic furrow, an evolutionary novelty that forms between the head and the trunk of fly embryos, plays a mechanical role in stabilizing embryonic ...

In the earliest hours after fertilization, an embryo takes its first steps toward becoming a living organism by shedding maternal control and activating its own genetic program. This critical process, ...

Embryonic germ layers are the fundamental organizing principle in animal development. They provide the structural basis from which tissues and organs arise. During early embryogenesis, cells divide to ...

Feathers are among the most complex cutaneous appendages in the animal kingdom. While their evolutionary origin has been widely debated, paleontological discoveries and developmental biology studies ...

Birds and mammals use the same genes to build their face, but deploy them differently in time and space. Cells and evolutionary change: The undifferentiated facial mesenchyme emerges as an essential ...