Michio Kaku Explains String Theory

In this excerpt from his Floating University/Great Big Ideas lecture, Dr. Michio Kaku explains that string theory begins where Einstein's framework breaks down.

Atomic bomb tests help scientists finally date sharks

Nuclear weapons, whale sharks, and how to use both to make eco-tourism more sustainable.

SCOTT TUASON/AFP via Getty Images
Surprising Science
  • Scientists have finally determined the age of whale sharks using radioactive elements from bomb tests.
  • Using the new data, the age range of the animals' bones has now been determined.
  • The findings will help conservationists better maintain whale shark populations.
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How intermittent fasting changes your brain

A new study from Singapore found that intermittent fasting increases neurogenesis.

Mind & Brain
  • Rats that fasted for 16 hours a day showed the greatest increase in hippocampal neurogenesis.
  • If true in humans, intermittent fasting could be a method for fighting off dementia as you age.
  • Intermittent fasting has previously been shown to have positive effects on your liver, immune system, heart, and brain, as well as your body's ability to fight cancer.
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Titanosaur footprints discovered on the roof of a French cave

Scientists discovered footprints made by some of the largest creatures ever to walk the Earth.

Credit: Jean-David Moreau et al./J. Vertebr. Paleontol.
Surprising Science
  • Paleontologists published a paper on the discovery of dinosaur footprints on the roof of a French cave.
  • The prints are deep underground and were made during the Middle Jurassic period.
  • The footprints belonged to titanosaurs, the largest land animals ever.
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