Lighting Produces Nitrates Lightning produces an essential nutrient for living things. What is it? Find out.

Top Ten Resources to Finish Up Your School Year NOVA Education has put together a list of our most popular educator resources. See the list.

A New Way to See Fingerprints Learn how columnar film technology can expose the details of fingerprints. Explore more.

Designing for Drilling on Mars See how the Curiosity rover collects rock samples with its robotic arm. Learn more.