Dudeney : un classique enfin traduit | Tangente

Henry Dudeney, master of mathematical puzzles | Tangente

In Clairaut’s footsteps

Alexis Clairaut is probably little known today. Yet his writings inspired many scientists. A compilation of 19th-century publications reveals a fame that has since faded.

Timeless mathematical puzzles | Tangente

Puzzles have been part of human culture since earliest antiquity. At first, inventing puzzles was bound up with mythology or religion; gradually, it became a purely intellectual game, independent of any purpose or practical application.

Did Leonardo da Vinci invent the drone? | Tangente

Taken together, several studies and inventions foreshadow the advent of drones in aerial photography.