A mock debate on time with British physicist and science writer Julian Barbour and NYU philosophy professor Tim Maudlin, reposted from FQXi’s Setting Time Aright conference in Copenhagen.
The climate change we are currently experiencing, while disconcerting and increasingly uncomfortable, is not unprecedented when viewed through the historical prism of life on Earth. A study led by researchers from Texas A&M University’s Department of Oceanography looks back at the water cycle that affected the Western United States in an era dating back some…
The atmosphere of Mars is less than 1% the density of Earth’s. It’s one of the reasons liquid water covers much of our planet but cannot exist on the Red Planet. As more research points toward the possibility of water on early Mars, scientists have increased their studies on the density of its atmosphere billions…
The fact that dinosaurs laid eggs put them at a considerable disadvantage compared to viviparous mammals. Weighing in at four tons, the mother animal was 2,500 times heavier than its newly hatched dinosaur baby. By way of comparison, a mother elephant, which is just as heavy, only weighs 22 times as much as its new-born…
Spacetime may be less like beer and more like sipping whiskey. Or so an intergalactic photo finish may suggest. Physicist Robert Nemiroff reached this heady conclusion after studying the tracings of three photons of differing wavelengths that were recorded by NASA’s Fermi Gamma-ray Space Telescope in May 2009. The photons originated about 7 billion light…
Trace elements in stars may influence the evolution of habitable zones around them where life as we know it might dwell. Stars are made nearly entirely from hydrogen and helium gas. Still, traces of heavier elements — which astronomers call metals, even if they are not what one normally think of as metals — can…
Microorganisms that crashed to Earth embedded in the fragments of distant planets might have been the sprouts of life on this one, according to new research from Princeton Univ., the Univ. of Arizona and the Centro de Astrobiología in Spain. The researchers report in the journal Astrobiology that under certain conditions there is a high…