Robinhood CEO's math-focused AI startup Harmonic valued at $1.45 billion in latest fundraising

AI startup Harmonic, co-founded by Robinhood CEO Vlad Tenev, secured $120 million at a $1.45 billion valuation to combat AI ...

National Parks to raise fees for millions of international tourists to popular US parks

The National Park Service said Tuesday it is going to start charging the millions of international tourists who visit U.S.