The massive columns of smoke generated by a nuclear war would alter the world's climate for years and devastate the ozone layer, endangering both human health and food supplies, new research shows.

Overlapping gene silencing mechanisms function to epigenetically repress transposable elements (TEs), including chromatin and DNA modification as well as RNAi. TEs are a major component of ...

An element is a substance that cannot be broken down into any other substance. Every element is made up of its own type of atom. This is why the chemical elements are all very different from each ...

A pure substance made from more than one type of element chemically bonded together. Elements bond in fixed ratios and so can be represented by a chemical formula. For example, sodium chloride has the ...

May 29, 2026 A new study suggests Antarctica’s ice sheet hit a climate tipping point about one million years ago, making it far more reactive to temperature and CO2 changes. Researchers warn this ...