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atom: The basic unit of chemical elements, consisting of a dense nucleus with positively charged protons and uncharged neutrons, orbited by a cloud of negatively charged…

Paul Brigginshaw/Millennium Images, UK What's the difference between time spent in bed and bank balance? No, this isn't the start of a terrible joke – and…

Avian influenza has been a problem for poultry for over a century, causing deaths in various birds like chickens, ducks, and geese. It is caused by…

ash: Small, light pieces of rock or glass ejected by a volcanic eruption. A group of deciduous trees in the olive family that are popular for…