Quemuel Arroyo, the New York transit system’s chief accessibility officer, has used a wheelchair for half his life. He understands how difficult it is to navigate the subway. By Emma G. Fitzsimmons ...

Cosmos (ATOM) is a blockchain ecosystem that facilitates interoperability among independent blockchains. Co-founded by Jae Kwon and Ethan Buchman in 2014, Cosmos aims to create a decentralized network ...