The Earth’s magnetic field has flipped 183 times over 83 million years, and a weakening field raises the risk of solar radiation and global power disruptions. Donald Trump mocked in Venezuela media ...

Adaptive radiation is the process by which a single lineage undergoes multiple speciation events to fill divergent ecological niches. This results in a cluster of phenotypically distinct, related ...

» What is meant by radiation “dose” of X rays? Radiation dose is a measure of how much energy is absorbed when something or someone is exposed to X-rays. This is important because it is this ...