At an ancient rock shelter in central Spain, archaeologists have unearthed a stone marked by a unique red dot. That spot — made using red ochre, a natural pigment —…

Biodiversity (noun, “By-oh-div-ER-sit-ee”) Biodiversity describes the variety of species in a region. This includes all forms of plant, animal, fungi and microbial life. Biologists estimate biodiversity a few different ways.…

Rip off a piece of tape in a dark room and you may see a flash of light. This happens because the peeling tape releases energy that creates tiny sparks.…

First, swaddle a fruit fly or other tasty prey in silk. Then barf toxins all over it. That’s how one type of spider prepares to dine. Giulia Zancolli recalls the…

You wake up and yawn, then put on a special pair of glasses. As you’re getting ready for the day, a friend calls. The glasses project an image of your…

For many teens, Saturday mornings are a time to snooze. After a week of getting up early, the weekend brings a chance to catch up on much-needed slumber. And sleeping…

Objective: Separate the different pigments in tree leaves Areas of science: Chemistry, Plants Time required: 1–2 days Key concepts: plant pigments, paper chromatography, leaves Credits: Teisha Rowland, PhD, Science Buddies;…

Chunks of ice fall from the sky, bounce off hard surfaces — and sometimes even break windshields and hurt crops. Maybe you’ve seen these pieces of ice laying on the…

A common ingredient of many plastics has just been linked to a high risk of death from diseases of the heart and blood vessels. The chemical is known as DEHP.…