Tom Howarth is a Newsweek reporter based in Bristol, U.K. His focus is reporting on nature and science. He covers climate change, biodiversity, extreme weather, zoonotic diseases and more.

Though unseen, groundwater is also an important source of the water supply. Aquifers ... This gorgeous map from Anna Riling of Four Corners Mapping shows the vast Navajo Aquifer in northeastern ...

Above-normal temperatures combined with paltry precipitation levels have led to rapid snowmelts across the U.S. West — ...