Leonardo da Vinci was not only an artist but also an engineer, scientist, and inventor. His notebooks reveal designs for machines, detailed anatomical studies, and observations far ahead of his time.

LONDON–The UK Ministry of Defense has signed a £1 billion ($1.3 billion) contract to acquire Leonardo’s AW149 battlefield utility helicopter for its New Medium Helicopter program. The contract ...

Iran threatens US Treasury buyers as Trump’s 48-hour ultimatum looms I was in the women's restroom when a man came in and ...