Scientists and engineers are trying to add touch to online shopping, virtual doctor appointments and artificial limbs.
Some female white-necked jacobin hummingbirds boast bright blue colors similar to males. That may help females blend in to avoid attacks.
The Coronavirus Pandemic
Some schools safely brought students back for in-person learning last year. Their experiences suggest how to avoid classroom spread of COVID-19 this year.
New video captures the first recorded instance of a tortoise hunting another animal.