My Replika avatar was supposed to help me understand why people fell for virtual companions. It taught me so much more.

By chaining the selectors together, he was able to encode invisible messages inside an emoji (or any other Unicode character). Here is how it works: Unicode assigns variation selectors (U+FE00–U+FE0F ...

Tuesday’s press conference in the Oval Office was already unusual, with Elon Musk standing behind President Donald Trump at the Resolute Desk to talk about the Department of Government Efficiency – ...