Health & Medicine
Cool Jobs: Saliva offers a spitting image of our health
Scientists are using this secretion to study our body’s functions, to test for disease and even to diagnose injury.
Word of the Week
Life
Scientists Say: Genus
A genus is a group of closely related species. It’s the first part of the two-part system called binomial nomenclature, used to name living things.
Explainers
Chemistry
Explainer: What are chemical bonds?
When various particles, atoms, ions or molecules come together to form a substance, they are held together with chemical bonds.
Technically Fiction
Physics
Staying grounded in space requires artificial gravity
On TV, people in space walk around like they’re on Earth. How can science give real astronauts artificial gravity? Spin right round, baby.
What's Hot
COVID-19 vaccines
Watch This
A sea slug’s head can crawl around and grow a whole new body
Some chopped-up flatworms can regrow whole bodies from bits and pieces. But a sea slug head can regrow fancier organs such as hearts.
