A historian identifies the worst year in human history

A Harvard professor's study discovers the worst year to be alive.

The Triumph of Death. 1562.

Credit: Pieter Bruegel the Elder. (Museo del Prado).
Politics & Current Affairs
  • Harvard professor Michael McCormick argues the worst year to be alive was 536 AD.
  • The year was terrible due to cataclysmic eruptions that blocked out the sun and the spread of the plague.
  • 536 ushered in the coldest decade in thousands of years and started a century of economic devastation.
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The Einstein-Bohr legacy: can we ever figure out what quantum theory means?

Quantum theory has weird implications. Trying to explain them just makes things weirder.

Credit: dani3315 / 269881579 via Adobe Stock
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  • The weirdness of quantum theory flies in the face of what we experience in our everyday lives.
  • Quantum weirdness quickly created a split in the physics community, each side championed by a giant: Albert Einstein and Niels Bohr.
  • As two recent books espousing opposing views show, the debate still rages on nearly a century afterward. Each "resolution" comes with a high price tag.
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Pupil size surprisingly linked to differences in intelligence

Maybe eyes really are windows into the soul — or at least into the brain, as a new study finds.

A woman's eye.

Credit: Adobe stock / Chris Tefme
Surprising Science
  • Researchers find a correlation between pupil size and differences in cognitive ability.
  • The larger the pupil, the higher the intelligence.
  • The explanation for why this happens lies within the brain, but more research is needed.
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Politics & Current Affairs

We are all conspiracy theorists

In each of our minds, we draw a demarcation line between beliefs that are reasonable and those that are nonsense. Where do you draw your line?

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