Elon Musk's brain-computer interface company successfully demonstrates a paralyzed patient playing chess and browsing the internet using only their thoughts, opening new possibilities for assistive technology.

The long-awaited Ethereum upgrade delivers on its promise of scalability, processing 100,000 transactions per second while maintaining decentralization and reducing gas fees to pennies.

Alphabet's Waymo expands its fully autonomous taxi service to 25 cities, completing over 1 million rides per day with zero accidents attributed to the self-driving system.