Elsevier

’Tis the season for knowing.

Take our holiday quiz and test yourself
on scientific discoveries from 2013.

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Why do wolves howl?

  • ABecause of separation anxiety.
  • BTo show their bond with other wolves.
  • CTo show their dominance.

Incorrect

Correct!

When a member of the wolf pack leaves the group, the howling by those left behind isn't a reflection of stress but of the quality of their relationships.

“Wolves Howl Because They Care.” Current Biology, 22 August 2013 Read More

Incorrect

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Drinking cold water makes chocolate taste...

  • ALess sweet, creamy and chocolaty.
  • BSweeter, creamier and more chocolaty.
  • CExactly the same.

Correct!

A study has shown that if you drink iced water before eating chocolate, you don't find it as sweet, creamy or chocolaty as people who skip a cold drink.

“8 facts (and myths) about water — like the 8-glass rule.” Food Quality and Preference, 22 March 2013 Read More

Incorrect

Incorrect

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The lunar cycle influences sleep because...

  • AThe moon's geophysical rhythms.
  • BThe Human body is made of 50-75% water.
  • CIt doesn’t, that’s a myth.

Correct!

Findings show evidence that humans — despite the comforts of our civilized world — still respond to the geophysical rhythms of the moon, driven by a circalunar clock.

“Bad night’s sleep? The moon might be to blame.” Current Biology, 25 July 2013 Read More

Incorrect

Incorrect

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Is there such a thing as too much coffee?

  • ANo, there is not.
  • BYes, everybody should avoid coffee.
  • COnly if you're under 55 years of age.

Incorrect

Incorrect

Correct!

A study of more than 40,000 individuals found a statistically significant 21% increased mortality in those drinking more than 28 cups of coffee a week and death from all causes, with a greater than 50% increased mortality risk in both men and women younger than 55 years of age.

“How much coffee is healthy? It depends on your age.” Mayo Clinic Proceedings, 16 August 2013 Read More

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