Astronomers have measured the background light from all the stars in the cosmos and inferred the number of stars created since the dawn of the universe, Using observations from NASA’s Fermi Gamma-ray Space Telescope, scientists discovered emissions from distant blazars – gamma ray-emitting supermassive black holes at the centers of galaxies. As matter falls into…
Amir D. Aczel blogs about physics and cosmology for Discover’s Crux: If somebody told you that there are angels floating in space, observing our world and forming their impressions of our everyday reality, you would think that this person is nuts—a religious fanatic with an active imagination, and certainly not a scientist. Scientists, as we…
Governments meeting in Australia have failed to reach agreement on new marine protected areas for the Antarctic ocean. They have deferred a decision until July 2013 when all the relevant science will be considered. Environmental groups have expressed deep concern about the lack of consensus on how to develop a network of protected zones. They…
The only modern humans whose ancestors did not interbreed with Neanderthals are apparently sub-Saharan Africans, researchers say. New findings, detailed in the journal PLoS ONE, suggest modern North Africans carry genetic traces from Neanderthals, modern humanity’s closest known extinct relatives. Although modern humans are the only surviving members of the human lineage, others once roamed…
British scientists today unveiled the world’s first family tree for all living birds – revealing that the group of species that outlived the dinosaurs is still evolving faster than anyone imagined. The unique snapshot goes back 110 million years to when our feathered friends shared the earth with T-Rex and the skies with pterodactyls. It…
Bulgarian archaeologists have found what they believe to be the oldest town in Europe, a salt production center called Solnitsata near the modern-day city of Provadia. Although the 6-millenium-old town held only 350 people or so, it was apparently very wealthy because it supplied salt to much of what is now the Balkans. The town…
A newly spotted ultra-bright star explosion burst onto the scene just 1.5 billion years after the big bang, making it the earliest known supernova. The event is one of two supernovae recently found in the distant universe. The other occurred a mere 3 billion years after the birth of the cosmos. Both explosions are so-called…
Superstorm Sandy was no freak, say experts, but rather a hint of a coming era when millions of Americans will struggle to survive killer weather. They’re telling us we shouldn’t be surprised that this 900-mile-wide monster marched up the East Coast paralyzing cities and claiming scores of lives. “It’s a foretaste of things to come,”…
From the darkened living rooms of Lower Manhattan to the wave-battered shores of Lake Michigan, the question is occurring to millions of people at once: Did the enormous scale and damage from Hurricane Sandy have anything to do with climate change? Hesitantly, climate scientists are offering an answer that is likely to satisfy no one,…
As a writer and activist Bill McKibben has devoted his life to tackling the threat posed by man-made climate change. As Hurricane Sandy brought normal life on the East Coast to a standstill, McKibben’s Twitter feed went into overdrive — a veritable deluge of storm updates and political commentary. He just took some time out of a very busy day…