Putting Einstein to the Test

Physicists have developed an experiment involving super cold matter and an empty elevator shaft that will test one concept crucial to Einstein's Theory of General Relativity.

Physicists have developed an experiment involving super cold matter and an empty elevator shaft that will test one concept crucial to Einstein's Theory of General Relativity. The experiment may shed light onto the tension between quantum physics and Einstein's relativity. "Einstein's 'equivalence principle', which underpins general relativity, says that if you stand in a falling elevator, your acceleration should effectively cancel out the pull of gravity, leaving you unable to determine whether you are in free fall or whether there is simply no gravity present at all," says the New Scientist. "Determining whether quantum systems are also subject to this equivalence principle might help pin down why quantum theory has so far resisted any merger with general relativity – a mystery that haunts physics."

Stress is contagious–but resilience can be too

The way that you think about stress can actually transform the effect that it has on you – and others.

Big Think Edge
  • Stress is contagious, and the higher up in an organization you are the more your stress will be noticed and felt by others.
  • Kelly McGonigal teaches "Reset your mindset to reduce stress" for Big Think Edge.
  • Subscribe to Big Think Edge before we launch on March 30 to get 20% off monthly and annual memberships.
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Think of the closest planet to Earth... Wrong! Think again!

Three scientists publish paper proving that not Venus but Mercury is the closest planet to Earth

Strange Maps
  • Earth is the third planet from the Sun, so our closest neighbour must be planet two of four, right?
  • Wrong! Neither Venus nor Mars is the right answer.
  • Three scientists ran the numbers. In this YouTube video, one of them explains why our nearest neighbour is... Mercury!
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Horseshoe crabs are captured for their blue blood. That practice will soon be over.

The blood of horseshoe crabs is harvested on a massive scale in order to retrieve a cell critical to medical research. However, recent innovations might make this practice obsolete.

An Atlantic horseshoe crab in an aquarium. Photo: Domdomegg via Wikimedia Commons.
Surprising Science
  • Horseshoe crabs' blue blood is so valuable that a quart of it can be sold for $15,000.
  • This is because it contains a molecule that is crucial to the medical research community.
  • Today, however, new innovations have resulted in a synthetic substitute that may end the practice of farming horseshoe crabs for their blood.
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10 novels that brilliantly capture the American experience

The distance between the American dream and reality is expressed best through literature.

American novelist, writer, playwright, poet, essayist and civil rights activist James Baldwin poses at his home in Saint-Paul-de-Vence, southern France, on November 6, 1979. (Photo: Ralph Gatti/AFP/Getty Images)
  • Literature expands our ability to feel empathy and inspires compassion.
  • These ten novels tackle some facet of the American experience.
  • The list includes a fictional retelling of the first Native American to graduate from Harvard and hiding out in inner city Newark.
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