The History of Headphones

Maybe the danger of digital culture to young people is not that they have hummingbird attention spans but that they are going deaf.

Given the current ubiquity of personal media players—the iPod appeared almost a decade ago—many researchers attribute this widespread hearing loss to exposure to sound played loudly and regularly through headphones. (Earbuds users typically listen at higher volume to drown out interference.) Indeed, the August report reinforces the findings of a 2008 European study of people who habitually blast MP3 players, including iPods and smartphones. According to that report, headphone users who listen to music at high volumes for more than an hour a day risk permanent hearing loss after five years.

LinkedIn meets Tinder in this mindful networking app

Swipe right to make the connections that could change your career.

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Swipe right. Match. Meet over coffee or set up a call.

No, we aren't talking about Tinder. Introducing Shapr, a free app that helps people with synergistic professional goals and skill sets easily meet and collaborate.

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Space toilets: How astronauts boldly go where few have gone before

A NASA astronomer explains how astronauts dispose of their, uh, dark matter.

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  • When nature calls in micro-gravity, astronauts must answer. Space agencies have developed suction-based toilets – with a camera built in to ensure all the waste is contained before "flushing".
  • Yes, there have been floaters in space. The early days of space exploration were a learning curve!
  • Amazingly, you don't need gravity to digest food. Peristalsis, the process by which your throat and intestines squeeze themselves, actually moves food and water through your digestive system without gravity at all.
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Carl Sagan on why he liked smoking marijuana

Carl Sagan liked to smoke weed. His essay on why is fascinating.

Photo: Photo by Robert Nelson on Unsplash / Big Think
Mind & Brain
  • Carl Sagan was a life long marijuana user and closeted advocate of legalization.
  • He once wrote an anonymous essay on the effects it had on his life and why he felt it should be legalized.
  • His insights will be vital as many societies begin to legalize marijuana.
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Can the keto diet help treat depression? Here’s what the science says so far

A growing body of research shows promising signs that the keto diet might be able to improve mental health.

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Mind & Brain
  • The keto diet is known to be an effective tool for weight loss, however its effects on mental health remain largely unclear.
  • Recent studies suggests that the keto diet might be an effective tool for treating depression, and clearing up so-called "brain fog," though scientists caution more research is necessary before it can be recommended as a treatment.
  • Any experiments with the keto diet are best done in conjunction with a doctor, considering some people face problems when transitioning to the low-carb diet.
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