Atmospheric rivers are often described as “rivers in the sky”; they’re narrow, flowing columns of condensed water vapor up in the atmosphere that can stretch over 2,000 kilometers (1,243 miles) long.

Usually, the stem cells found in the bone marrow produce the right amount of each type of blood cell to keep us healthy – but ...

It came down to differences in their vertebrae and genetic markers, which were enough to establish a new-to-science species: ...

Across the pond, the oldest river in Europe is thought to be the Meuse, which flows 950 kilometers (590 miles) through three ...