The origin of life on Earth stands as one of the great mysteries of science. Various answers have been proposed, all of which remain unverified. To find out if we are alone in the galaxy, we will need ...

Beyond the essential ideas of broad access to food, housing, quality education, health care and employment, quality of life also may include intangibles such as job security, political stability ...

there is still no definite conclusion as to whether exposure due to natural background carries a health risk, even though it has been demonstrated for exposure at a level a few times higher. We all ...