Trovants Are Stones That Seem to Grow, Move and Reproduce

Trovants such as these are found only in Romania and have become such a tourist attraction…

Batesian Mimicry: How Copycats Protect Themselves

A hornet moth (Sesia bembeciformis), right, mimics its lookalike, the European hornet (Vespa crabro) in an…

How to Subtract Fractions

Step 1: Find the Least Common Denominator When subtracting fractions with different denominators, the task is…

Where Do Bullets Go When Guns Are Fired Straight Up Into the Air?

Aside from the perplexing question of why such a reckless, potentially lethal practice remains so popular,…

22 Astronomical Events to Look Out for in 2023

Look up, stargazers! The sky's the limit this year for chances to see stunning meteor showers…

Why Did the Russians Seal Up the Kola Superdeep Borehole?

The small blue-and-white cap seen surrounded by rubble is all that seals the 40,230 feet (12,262…

How Does Snow Muffle Sound?

The whole world seems to get unnaturally quiet after a snowfall, but why? Tainar/Shutterstock Have you…

The 10 Longest Bridges in the World

The Lake Pontchartrain Causeway, once the world's longest bridge at just under 24 miles (39 kilometers),…

Crumple Theory: We Can Learn a Lot From How Paper Crumples

That idea formed the basis of experiments performed several years ago by another of the paper's…

What If an Asteroid Hit Earth?

Chances of an asteroid hitting are pretty small. NASA has tracked 90 percent of the near-Earth…