About 70,000 years ago, when the human species was already on Earth, a small reddish star approached our solar system and gravitationally disturbed comets and asteroids. Astronomers from the Complutense University of Madrid and the University of Cambridge have verified that the movement of some of these objects is still marked by that stellar encounter. […]
On Nov. 11, 2014, a global network of telescopes picked up signals from 300 million light years away that were created by a tidal disruption flare — an explosion of electromagnetic energy that occurs when a black hole rips apart a passing star. Since this discovery, astronomers have trained other telescopes on this very rare […]
Mass mortality of seabirds. Marine mammal deaths. Alaskans sickened by shellfish. What’s the common theme? Seawater contaminated by toxic algae. Call it death by phytoplankton. A group of Alaskans — including state officials, tribes, nonprofit organizations and researchers — have recently come together to try to combat these marine toxins. The goal is to keep […]
Source: VOA