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Have astronomers spotted Planet Nine?

Archived observations appear to show a moving object in the far-distant outer solar system, but its reality is unclear

Kevin Roose says the race to build superintelligence is accelerating

What happens when a technology becomes more powerful than its creators can fully understand?

This brain change can make foxes act like pet dogs

Using data from a 1950s Russian experiment, researchers are getting "to the heart of brain programming" in foxes

Math Puzzle: Secret formula

Can you guess the puzzle writer's secret formula?

The mathematical trick that explains how to find a needle in a haystack

We asked a statistics expert how difficult it would be to find a needle in a haystack—the answer is: just as hard as you think

Nothing can be fully transparent, physicists discover

Quantum researchers show how materials inevitably absorb light

Earth's rocks have a missing layer spanning up to a billion years. Scientists finally know what happened to it

The 'Great Unconformity' has puzzled scientists since its discovery in the 1870s