The average lifespan of a friendship? 10 years. Here’s why.

This is the psychology of why friendships (and marriages) fail.

  • Some friendships last a lifetime, but most have a lifespan. In the U.S., best friends tend to last for 10 years on average, says Nicholas Christakis.
  • In friendships, one person may begin to defect or "free ride", which causes the other person to choose between cooperation or defection. People tend to choose the latter so they won't be taken advantage of.
  • A certain amount of social fluidity, taking a breather from a friendship, can actually make a friendship last longer.

Insects on Mars? Ohio scientist claims NASA images show life on Red Planet.

Entomologist William Romoser of Ohio University says NASA images depict insect- and reptile-like creatures on Mars.

Image source: NASA/JPL; William Romose / Ohio University
Surprising Science
  • Entomologist William Romoser gave a presentation this week in which he claimed NASA photos show evidence of creatures, some still living, on the red planet.
  • Romoser has worked as a professor of entomology at Ohio University for four decades.
  • It's likely that the real phenomenon in Romoser's work is pareidolia — the tendency to "see" recognizable shapes among random visual data.
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New space dangers found by NASA in astronaut blood

A study found alarming changes in the bodies of astronauts aboard the International Space Station.

Credit: NASA
Surprising Science
  • A NASA study reveals new dangers to the human body in space.
  • The absence of gravity caused changes in people's blood flows.
  • Some had blood going in reverse while others developed clots.
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Solidarity is not dead: How workers can force progressive change

Can collective protest still change the world?

Christophe Morin/IP3/Getty Images
Politics & Current Affairs

In November last year, 20,000 Google employees across the world walked out of work.

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