Math took center stage at the United States Supreme Court in a case challenging the voting districts for the state of Wisconsin. Another case looked at a voting district in Maryland.

You may think you’re going deep undercover when you set your web browser to incognito. But you’d likely be mistaken, a new study finds.

The idea that people can learn who tracks where they go on the internet just by reading a website’s privacy policies “is pure fiction,” reports the author of a new data-privacy study.

Traditional hair dyes contain lots of nasty, smelly chemicals. Some scientists are working to change all that. Their new graphene-based black dye is nontoxic and as long-lasting as today’s store-bought hair colorings.