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How long do neutrons live? Physicists close in on decades-old puzzle

nature.com
  • After 15 years of struggling with a measurement discrepancy, physicists might soon uncover precisely how long it takes a neutron to die.
  • Neutrons are stable inside atoms, but on their own they decay in about 15 minutes. Since 2005, there have been two measuring methods which - replicated in various labs across the world - generate results different by 8 seconds.
  • Solving this mystery will help scientists understand how much hydrogen, helium, and other light elements were created in the first few minutes after the Big Bang.
  • They could also hunt for new types of physics, as knowing the neutron’s lifetime would help constrain measurements of other subatomic particles.
Bulleted by Dawid Andrzejewski
on April 19, 2019

New study finds simple way to inoculate teens against junk food marketing

news.chicagobooth.edu
  • Researchers have found that exposing manipulative marketing techniques to teens can help them reduce unhealthy food intake.
  • In the study, a group of teenagers read an article about marketing techniques used by big food companies.
  • Then they drew on ads in order to transform them from false to true to reinforce the negative portrayal of food marketing.
  • The first big finding is that this exercise generated long-term lasting effects.
  • Secondly, boys, in particular, were more responsive, reducing unhealthy drink and snack purchases by 31%.
Bulleted by Michał Słupski
on April 18, 2019

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Travel through wormholes is possible, but slow

phys.org
  • A team led by Harvard physicist Daniel Jafferis developed a new theory which connects gravity with quantum mechanics.
  • Using quantum field theory tools, the team shows that tunnels in curved space-time connecting two distant places can exist, and be used for travel.
  • The theory is based on a setup created by Einstein and Rosen - a connection between two black holes now known as a wormhole.
  • The problem is the direct connection between black holes is shorter than the wormhole connection, so it wouldn’t be very useful.
  • The main benefits of this study are new insights into quantum mechanics.
Bulleted by Veronika
on April 17, 2019

Best in snow: New scientific device creates electricity from snowfall

newsroom.ucla.edu
  • A new device - snow-based triboelectric nanogenerator, or snow TENG - creates electricity from falling snow, among other potential uses.
  • Richard Kaner (highly influential and cited scientist) and team used 3D printing to design a device that combines silicone with an electrode.
  • Thanks to “the ease of fabrication and the availability of silicone” the device, which is essentially a small sheet of plastic, could be produced at low cost.
  • It can work in remote areas, doesn’t need batteries, and could be used in solar panels, or self-powered wearables for tracking athletes.
Bulleted by Michał Słupski
on April 16, 2019

Medicaid could save $2.6 billion within a year if just 1 percent of recipients quit smoking

ucsf.edu
  • A scientist from a tobacco research center estimates that US medical insurance could save $2.6 billion per year if just 1% of insured people in each state quit smoking.
  • The author used previous research which showed that a 1% reduction in smoking is associated with 0.118% smaller health care spending per capita.
  • Total Medicaid (a federal and state program that helps with medical costs in the US) costs in 2017 were $577 billion, so these savings would still be a drop in the ocean.
  • The study indicates that US health care officials might need to push harder against smoking.
Bulleted by Dawid Andrzejewski
on April 16, 2019

Newsletter

Categories

  • Science Science (21) How long do neutrons live? Physicists close in on decades-old puzzle
  • Psychology Psychology (17) Want to learn a new skill? Take some short breaks
  • Cosmos Cosmos (9) Travel through wormholes is possible, but slow
  • History History (6) Along the coast of Peru, scientists discover an ancient whale with 4 legs
  • Society Society (14) New study finds simple way to inoculate teens against junk food marketing
  • Medicine Medicine (10) 'Dismantling cancer' reveals weak spots
  • Technology Technology (15) Best in snow: New scientific device creates electricity from snowfall
  • Nature Nature (6) Unique oil eating bacteria found in world’s deepest ocean trench

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Categories

  • Science Science (21) How long do neutrons live? Physicists close in on decades-old puzzle
  • Psychology Psychology (17) Want to learn a new skill? Take some short breaks
  • Cosmos Cosmos (9) Travel through wormholes is possible, but slow
  • History History (6) Along the coast of Peru, scientists discover an ancient whale with 4 legs
  • Society Society (14) New study finds simple way to inoculate teens against junk food marketing
  • Medicine Medicine (10) 'Dismantling cancer' reveals weak spots
  • Technology Technology (15) Best in snow: New scientific device creates electricity from snowfall
  • Nature Nature (6) Unique oil eating bacteria found in world’s deepest ocean trench

Follow us

👍

You can browse through bullet points by joining our group on Facebook.

🛸

Same on reddit /r/BulletsTech.

🤖

Technologically savvy people can install Bullets.tech which works in the terminal.

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Technologically savvy, but in 2000s, can use our RSS Feed.

📖

Download our e-book Issue #1 (April, 2019).