In the cosmic equivalent of a total knock-out punch, two galaxies collided some eight billion years ago and kicked the gas out of each other. That’s the latest explanation for a cosmic mystery that’s had astronomers scratching their heads since 2018: two dim, puffy galaxies that appear to be completely devoid of dark matter. New … Read more
The first image of our Galaxy’s supermassive black hole, released earlier this month, has already begun to explain some enduring mysteries about the heart of the Milky Way. The wealth of new information about the black hole, called Sagittarius A *, joins many other lines of evidence that are now painting a detailed picture of … Read more
Schematic drawing of a subset of the animals that were investigated as part of the research. Metabolic rates and resulting thermophysiological strategies are color-coded, orange hues characterize high metabolic rates coinciding with warm-bloodedness, and blue hues characterize low-metabolic rates coinciding with cold-bloodedness. From left to right: Plesiosaurus, Stegosaurus, Diplodocus, Allosaurus, Calypte (modern hummingbird). Credit: © … Read more
The origin of the Universe – the beginning of everything – is one question where scientific and religious narratives sometimes get blurred. This is not because they approach the problem in the same way; clearly they do not. It is because the question being asked of both is the same. We want to know how … Read more
Billions of years ago, a river flowed across this scene in a Mars valley called Mawrth Vallis. A new study examines the tracks of Martian rivers to see what they can reveal about the history of the planet’s water and atmosphere. Credit: NASA / JPL Caltech / University of Arizona Mars once ran red with … Read more
Billions of years ago, a river flowed across this scene in a Mars valley called Mawrth Vallis. A new study examines the tracks of Martian rivers to see what they can reveal about the history of the planet’s water and atmosphere. Credit: NASA / JPL Caltech / University of Arizona Mars once ran red with … Read more
The month of May could come to an end with a spectacular sky show – or a dud. That’s what astronomy experts are saying about a fairly new meteor shower known as Tau Herculids, which is expected to be visible during the late-night hours on Monday, May 30, into the early-morning hours on Tuesday, May … Read more
The month of May could come to an end with a spectacular sky show – or a dud. That’s what astronomy experts are saying about a fairly new meteor shower known as Tau Herculids, which is expected to be visible during the late-night hours on Monday, May 30, into the early-morning hours on Tuesday, May … Read more
Traquair, RH On the fossil fishes at Achanarras Quarry, Caithness. Ann. Mag. Nat. Hist. 6479–486 (1890). Google Scholar Article Jarvik, E. Basic Structure and Evolution of Vertebrates Vol. I (Academic Press, 1980). Ahlberg, PE, Clack, JA & Lukševičs, E. Rapid braincase evolution between Panderichthys and the earliest tetrapods. Nature 38161–64 (1996). ADS CASE Article Google … Read more
This illustration depicts, from left, plesiosaurus, stegosaurus, diplodocus, allosaurus and calypte (modern hummingbird), with red hues indicating warm-bloodedness and blue hues for cold-bloodedness. (J. Wiemann) Estimated read time: 4-5 minutes ATLANTA – Fearsome predators like T. rex and towering, telescope-necked dinosaurs, such as brachiosaurus, were warm-blooded creatures in the same way birds and mammals are, … Read more
