Ultracold gas exhibits bizarre quantum behavior

New experiments find weird quantum activity in supercold gas.

Credit: Pixabay
  • Experiments on an ultracold gas show strange quantum behavior.
  • The observations point to applications in quantum computing.
  • The find may also advance chaos theory and explain the butterfly effect.
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    Time: Do the past, present, and future exist all at once?

    Does time exist? Here's what the debate is all about.

    • Everything we do as living organisms is dependent, in some capacity, on time. The concept is so complex that scientists still argue whether it exists or if it is an illusion.
    • In this video, astrophysicist Michelle Thaller, science educator Bill Nye, author James Gleick, and neuroscientist Dean Buonomano discuss how the human brain perceives of the passage of time, the idea in theoretical physics of time as a fourth dimension, and the theory that space and time are interwoven.
    • Thaller illustrates Einstein's theory of relativity, Buonomano outlines eternalism, and all the experts touch on issues of perception, definition, and experience.
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    3 wonders of the universe, explained

    Astronomer Michelle Thaller schools us on what atoms really look, the Big Bang theory, and the speed of light.

    • Most people have seen atoms illustrated in textbooks and know about the Big Bang and the speed of light, but there is a good chance what you think you know is not scientifically accurate.
    • Michelle Thaller, an astronomer and Assistant Director for Science Communication at NASA, is here to clear up the misconceptions and explain why atoms don't actually look that way, why the Big Bang is a misnomer, and why the speed of light is more than just really fast.
    • Is there an edge of space? Does light experience time? Watch this video for answers to those and other interesting questions.

    Study shows why face shields don’t work as well as face masks

    Some people choose alternatives to masks for comfort. A study shows the difference in effectiveness.

    Credit: Siddhartha Verma, Manhar Dhanak, John Frankenfield
    • A new study provides a visualization of why face shields are ineffective at stopping the spread of COVID-19.
    • Using a mannequin that could simulate coughing, the authors demonstrated how water droplets slide around shields.
    • The authors conclude that shields are not an effective replacement for masks.
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    The Earth may have been wet from the very start

    A new study finds the rocks that first formed Earth carried with them enough hydrogen for three times the water we have today.

    Credit: NASA
    • Enstatite chondrite meteorites are rare today, but they may have been Earth's basic building blocks.
    • A study finds these meteorites contain a surprising amount of hydrogen, nitrogen, and water.
    • The implication of the study is that Earth had all of its water from the beginning.
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