FactoSphere: Things worth knowing.

Animals & nature

How Narwhal Tusks Grow and What They Do

The narwhal’s spiral tusk is an elongated upper-jaw canine associated with sexual selection, sensory functions and several observed or proposed uses.

Clear, sourced explanations of surprising and useful things across history, technology, geography, food, nature and science.

This article examines how video game technology has developed over the years and its implications.

The Arctic tundra is a resilient yet fragile biome shaped by extreme conditions.

Honey's chemical makeup and storage conditions make it able to resist spoilage for thousands of…

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