Henry Yuen is developing a new mathematical language to describe problems whose inputs and outputs aren’t ordinary numbers.

Imagine walking through a rainforest and catching the smell of buttered popcorn. You are nowhere near a snack stand, yet the scent feels real. If you track it, you might not find food. You might find ...

Trump's Cambodia-Thailand ceasefire under strain as Thai forces allegedly occupy Cambodian territory, displacing 80,000 ...