A resurrected ancient enzyme is helping scientists test how reliably Earth’s oldest rocks record signs of life.

Deep in your muscles, an enzyme called AMPD1 helps turn chemical fuel into usable energy. When it does not work well, muscles tire faster.

In biology, enzymes have evolved over millions of years to drive chemical reactions. Scientists have now derived universal rules to enable the de novo design of optimal enzymes. As an example, they ...

Here's what enzymes are, what they do and how you'll know if you are ever low on them.