Chris Welch is a senior reviewer who has worked at The Verge since its founding in 2011. His coverage areas include audio (Sonos, Apple, Bose, Sony, etc.), home theater, smartphones, photography ...

Photo of a (currently) dry, dusty cave south of the Atlas mountains. In the past, water was flowing down this large stalagmite formation. We date tiny pieces of stalagmite (~0.25g) to establish when ...