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Did AI researchers let AI hallucinations into scientific papers?

Investigating a claim that 100 made-up claims were found in AI papers

Did a Roman charioteer really earn the equivalent of $15 billion dollars?

Is Chelsea’s Liam Delap a maths genius? Or has he got a trick up his sleeve?

Europe holds trillions of dollars of US shares and bonds - but can they use them?

Tim Harford asks if Greenland is really as vast as most maps seem to suggest

Influencers claim that this study shows that covid jabs cause cancer. That is not true

We investigate if there are actually 300 billion barrels of oil in Venezuela's reserves

From passenger numbers to world cup travel, we cast our eye forwards into 2026

From tariffs to comets, we look back at the numbers of 2025 across the world

Can the same pill cost $3 in a pharmacy and $750 in a hospital?