Topline Children who are more physically active could be less susceptible to respiratory tract infections like the common cold, according to a study published in Pediatric Research Monday, as less than one-quarter of children are estimated to have participated in at least an hour of physical activity each day. Children who exercise often are less […]

Illustration of herd of mammoths (Mammuthus primigenius) in winter landscape. De Agostini via Getty Images The mystery surrounding the exact timing of the extinction of mammoths has long captivated paleontologists. The latest timeline published in 2021 in the journal Nature suggested mammoths met their end much more recently than we believed. An international team of […]

The just-found near-Earth asteroid 2023 BU will sail just 3,500 km above Earth this week. Getty An asteroid about the size of a giraffe was discovered last weekend and will make an extremely close approach to Earth this Thursday just as a much more distant “green comet” is brightening. Near-Earth asteroid 2023 BU—about 12-28ft./3.8-8.5 m […]

A region of glowing gas in the Sagittarius arm of the Milky Way galaxy, NGC 3576 is located about … [+] 9,000 light years from Earth. Such nebulas present a tableau of the drama of the evolution of massive stars, from the formation in vast dark clouds, their relatively brief (a few million years) lives, […]