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African clawed frog (stock image). Credit: © Nathan / Adobe Stock Free fingers have many obvious advantages on land, such as in locomotion and grasping, while webbed fingers are typical of aquatic or gliding animals. But both amphibians and amniotes -- which include mammals, reptiles, and birds -- can have webbed digits. In new research…

Black hole illustration (stock image). Credit: © vchalup / Adobe Stock Astronomers at the University of California, Riverside, have discovered that powerful winds driven by supermassive black holes in the centers of dwarf galaxies have a significant impact on the evolution of these galaxies by suppressing star formation. Dwarf galaxies are small galaxies that contain…

Illustration of bacterium Pseudomonas aeruginosa (stock image). Credit: © Kateryna_Kon / Adobe Stock More than 200 square meters of our bodies -- including the digestive tract, lungs, and urinary tract -- are lined with mucus. In recent years, scientists have found some evidence that mucus is not just a physical barrier that traps bacteria and…

Illustration of prehistoric human with animal skeleton (stock image). Credit: © Kovalenko I / Adobe Stock Tel Aviv University researchers, in collaboration with scholars from Spain, have uncovered evidence of the storage and delayed consumption of animal bone marrow at Qesem Cave near Tel Aviv, the site of many major discoveries from the late Lower…

Illustration of prehistoric human with animal skeleton (stock image). Credit: © Kovalenko I / Adobe Stock Tel Aviv University researchers, in collaboration with scholars from Spain, have uncovered evidence of the storage and delayed consumption of animal bone marrow at Qesem Cave near Tel Aviv, the site of many major discoveries from the late Lower…

Illustration of prehistoric human with animal skeleton (stock image). Credit: © Kovalenko I / Adobe Stock Tel Aviv University researchers, in collaboration with scholars from Spain, have uncovered evidence of the storage and delayed consumption of animal bone marrow at Qesem Cave near Tel Aviv, the site of many major discoveries from the late Lower…

Koala (stock image). Credit: © rueangrit / Adobe Stock In animals, infections are fought by the immune system. Studies on an unusual virus infecting wild koalas, by a team of researchers from the University of Massachusetts Medical School and the University of Queensland, reveal a new form of "genome immunity." The study appears October 10…

DNA illustration (stock image). Credit: © Giovanni Cancemi / Adobe Stock An Ontario-led research group has discovered a novel cancer-driving mutation in the vast non-coding regions of the human cancer genome, also known as the "dark matter" of human cancer DNA. The mutation, as described in two related studies published in Nature on October 9,…

Salamander (stock image). Credit: © Alexander Limbach / Adobe Stock Contrary to popular belief, cartilage in human joints can repair itself through a process similar to that used by creatures such as salamanders and zebrafish to regenerate limbs, researchers at Duke Health found. Publishing online Oct. 9 in the journal Science Advances, the researchers identified…

The Lunar Reconnaissance Orbiter captured these views of the Lunar South Pole. Credit: NASA/Scientific Visualization Studio The discovery of ice deposits in craters scattered across the Moon's south pole has helped to renew interest in exploring the lunar surface, but no one is sure exactly when or how that ice got there. A new study…

Portuguese water dog. Owning a dog may be associated with having a longer life. Credit: Copyright Michele Hogan Dog ownership may be associated with longer life and better cardiovascular outcomes, especially for heart attack and stroke survivors who live alone, according to a new study and a separate meta-analysis published in Circulation: Cardiovascular Quality and…

Lithium-ion batteries concept (stock image). Credit: © malp / Adobe Stock The Royal Swedish Academy of Sciences has decided to award the Nobel Prize in Chemistry 2019 to John B. Goodenough, of The University of Texas at Austin, USA, M. Stanley Whittingham, of Binghamton University, State University of New York, USA, and Akira Yoshino of…

Portuguese water dog. Owning a dog may be associated with having a longer life. Credit: Copyright Michele Hogan Dog ownership may be associated with longer life and better cardiovascular outcomes, especially for heart attack and stroke survivors who live alone, according to a new study and a separate meta-analysis published in Circulation: Cardiovascular Quality and…

Illustration of exoplanet orbiting star (stock image). Credit: © vchalup / Adobe Stock The Royal Swedish Academy of Sciences has decided to award the Nobel Prize in Physics 2019 "for contributions to our understanding of the evolution of the universe and Earth's place in the cosmos" with one half to James Peebles of Princeton University,…

Milky Way Galaxy today as seen from Earth (stock image). Credit: © narathip12 / Adobe Stock A titanic, expanding beam of energy sprang from close to the supermassive black hole in the centre of the Milky Way just 3.5 million years ago, sending a cone-shaped burst of radiation through both poles of the Galaxy and…

Marathon runners (stock image). Credit: © babaroga / Adobe Stock The Nobel Assembly at Karolinska Institutet has today decided to award the 2019 Nobel Prize in Physiology or Medicine jointly to William G. Kaelin Jr., Sir Peter J. Ratcliffe and Gregg L. Semenza for their discoveries of how cells sense and adapt to oxygen availability.…

NASA's Curiosity Mars rover took this selfie on May 12, 2019. Credit: NASA/JPL-Caltech/MSSS If you could travel back in time 3.5 billion years, what would Mars look like? The picture is evolving among scientists working with NASA's Curiosity rover. Imagine ponds dotting the floor of Gale Crater, the 100-mile-wide (150-kilometer-wide) ancient basin that Curiosity is…

Saturn illustration (stock image). Credit: © Dimitar Marinov / Adobe Stock Move over Jupiter; Saturn is the new moon king. A team led by Carnegie's Scott S. Sheppard has found 20 new moons orbiting Saturn. This brings the ringed planet's total number of moons to 82, surpassing Jupiter, which has 79. The discovery was announced…

Andromeda Galaxy (stock image). Credit: © Siggi / Adobe Stock Astronomers have pieced together the cannibalistic past of our neighbouring large galaxy Andromeda, which has now set its sights on the Milky Way as its next main course. The galactic detective work found that Andromeda has eaten several smaller galaxies, likely within the last few…

Industrial pollution concept illustration (stock image). Credit: © freshidea / Adobe Stock New research shows that maternal exposure to a common and ubiquitous form of industrial pollution can harm the immune system of offspring and that this injury is passed along to subsequent generations, weakening the body's defenses against infections such as the influenza virus.…