A short overview of two different nuclear processes: fission and fusion.
An invasive species is a type of animal, plant, fungus or any other living thing that has arrived in a new environment and can harm other species there.
Dinosaurs ruled the Earth for about 174 million years. There were many types of dinosaurs, in all shapes and sizes.
They're not as famous as Darwin or Curie, but these heroes made our lives better through groundbreaking achievements.
Learn exactly how Einstein's theory of relativity works, and discover how there's nothing in science that says time travel is impossible.
The international date line is a concept often fraught with misunderstanding and confusion. But it plays an important role in our lives and a central role in timekeeping.
American black bears are the smallest and most common bear in North America. They are highly adaptable, with a diet that includes honey and moose.
Acetaminophen belongs to two classes of drugs: analgesics (pain relievers) and antipyretics (fever reducers).
The American holiday Juneteenth is observed on June 19. It is also known as Emancipation Day and Black Independence Day.
Pregnancy lasts about 40 weeks and is divided into three stages, or trimesters, each with unique symptoms and changes in the mother's body and in fetal development.
Cottonmouths, or water moccasins, are venomous snakes in North America that display white mouths when threatened.
Find out all the science of the Milky Way, including the size of our home galaxy, who discovered it and how it's on a collision course with another galaxy.
Lemurs include a diverse group of primates, from sun-worshipping ring-tailed lemurs to the peculiar, nocturnal aye-aye.
Greenhouse gases are atmospheric gases that absorb infrared radiation and trap heat in the atmosphere. Increases in emissions of these gases are leading to climate change and global warming.