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Showing results 91-101 of 105 for 'Physics'


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    What the Neutron Star Collision Means for Dark Matter

    In October, LIGO and its European counterpart, VIRGO, witnessed gravitational waves rippling out from a breathtaking collision between two neutron stars. This unprecedented event looked like yet another triumph for a new kind of astronomy, one that could use gravitational waves to probe some of the universe’s deepest mysteries. But in all the excitement, most people didn’t notice that something had died: a whole group of theories that posit a universe with no dark matter.

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    Neptune’s Other Moons Were Normal Until Triton Crashed the Party

    <em>New Scientist</em> reports on the mess Triton, the largest of Neptune’s many moons, made when it joined that planet’s lunar group. A Weizmann scientist and her Colorado colleague “used a series of computer simulations to figure out what the Neptune system was like before Triton barrelled in.”

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    Deadly Floods Will be the ‘New Normal’

    In warming climates, mid-latitude storms will travel further toward the poles before they reach their maximum intensity - and this, scientists say, will be the ‘new normal’. The study suggests that impacts on weather and climate will be strongest in regions close to the northeastern ocean boundaries, such as the UK and the US west coast.

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    Colder and Colder

    When investigating atoms, scientists face a challenge – at room temperature, individual atoms in a gas have kinetic energy and spin about at high velocities. Temperature is, in essence, the measurement of the relative movement between atoms; thus the goal of getting the atoms to have small relative velocities involves freezing them to extremely cold temperatures.

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    “Brain on a Chip” Reveals How the Brain Folds

    Being born with a “tabula rasa” – a clean slate – is, in the case of the brain, something of a curse. Our brains are already wrinkled like walnuts by the time we are born. Babies born without these wrinkles – called smooth brain syndrome – suffer from severe developmental deficiencies and their life expectancy is markedly reduced. The gene that causes this syndrome recently helped Weizmann Institute of Science researchers to probe the physical forces that cause the brain’s wrinkles to form. In their findings, reported in Nature Physics, the researchers describe a method they developed for growing tiny “brains on chips” from human cells that enabled them to track the physical and biological mechanisms underlying the wrinkling process.

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    2018 International Safe-Cracking Tournament

    The Davidson Institute of Science Education’s International Physics Tournament challenges teams of high school students from around the world to design impenetrable safes. Each spring, the teams travel to the Weizmann campus in Israel, where they compete to unlock one another’s safes by solving the underlying physics riddles. On March 20-21, 2018, six teams—hailing from the Atlanta Jewish Academy in Atlanta, GA; Bruriah High School in Elizabeth, NJ; Green Valley High School in Henderson, NV; the Gregory School in Tucson, AZ; the Emery/Weiner School in Houston, TX; and Rancho High School in Las Vegas, NV—represented the United States at the 23rd annual competition. The American students joined other teams from countries such as England, Argentina, Romania, Canada, and Angola.

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