Penguins may lack teeth, but they have backward facing spines in their throats that grip and guide fish down.

These snowflakes were spotted all over New York City. Meteorologist Chris Dolce explained that all of these sightings are due to the specific way they've fallen:

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Unlike most bees, which hibernate during colder months, honey bees remain active all winter long despite the freezing temperatures.

A honey bee colony’s ability to survive the winter depends on their food stores of honey. Once the colony begins to run out of honey, the worker bees force the useless drones from the hive, to maintain the food store.

As temperatures drop, the honey bee workers form a cluster around the queen and brood, keeping them warm. Bees on the inside of the cluster can feed on the stored honey. If surrounding temperatures rise, the bees on the outside of the group separate a bit, to allow more air flow. As temperatures fall, the cluster tightens, and the outer bees pull together.

As it gets colder, the worker bees actively ...

Brain freeze is the name used to describe the sensation you get when you consume something really cold, really fast. The scientific name for this temporary cold-stimulus headache is sphenopalatine ganglioneuralgia.

When something extremely cold touches the upper-palate (roof of the mouth), blood vessels in this region dilate to increase blood flow to counter the cold. The homeostatic triggers in your body perceive the cold as a threat to the brain, thinking the brain is in danger from the cold. As the warm blood rushes to your brain, this build-up of blood pressure causes the pain you feel. While brain freezes are not dangerous, they are slightly uncomfortable, so the best way to make it quickly go away is to rub or press your tongue against ...