Each strand of hair has its own life cycle. Growth happens in four stages: anagen, catagen, telogen, and exogen. The hair ...

Watch the oak tree change through the seasons. Acorns falling from the oak tree are often eaten by squirrels, or buried to eat over the winter. Many insects and birds make the oak tree their home ...

The three-dimensional shape of a protein can be used to resolve deep, ancient evolutionary relationships in the tree of life, according to a study in Nature Communications.

This old oak tree has been ... Find out how plants grow, eat, move and reproduce. An animation illustrating the different stages in plant development. The life cycle of a dandelion.