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Nine Soviet hikers died under bizarre circumstances in the Ural Mountains—and the mystery endured for decades.

A 600-year-old illustrated codex that no one has ever decoded — here's what we actually know.

A 2,000-year-old Greek device that could predict eclipses and track the cosmos—centuries before its time.

From the amphitheatre stage to the imperial throne, Theodora's rise remains one of history's most astonishing stories.
The teenage priest-emperor who scandalized Rome and was murdered at 18.
How one of Britain's most dangerous criminals evaded justice for years while the wrong man was prosecuted.
How one Scottish lawyer-statesman blunted the Jacobite threat and shaped the fate of 18th-century Britain.

What is a daisy head, why does it form, and what makes it so unusual in the plant world?

The Iceni warrior queen who burned Londinium to the ground and shook the Roman Empire to its core.
Intelligence of machines
Artificial intelligence (AI) is the capability of computational systems to perform tasks typically associated with human…
Subset of artificial intelligence
Machine learning (ML) is a field of study in artificial intelligence concerned with the development and study of statist…