The best AI chatbots of 2026: I tested ChatGPT, Copilot, and others to find the top tools around

I pushed eight free AI chatbots to their limits to find the best AI chatbots of 2026. To explore our top picks, check out ZDNET's chatbot-by-chatbot guide.

Is Jupiter smaller than we thought? NASA spacecraft makes new find

New data from NASA's Juno orbiter reveals Jupiter is slightly smaller and more 'squashed' than scientists previously thought.