Have you ever wondered why moose in Alaska are larger than their southern relatives? Have you considered why many Arctic mammals appear bulkier than species living closer to the equator? There’s a ...

City birds are changing fast. Their wings are getting shorter and rounder to navigate busy streets and buildings. Beaks are also adapting to urban food sources. These rapid evolutionary shifts show ...

President Trump provided conflicting messages about when the U.S. and Israel's war with Iran will end. And, NPR investigates how late convicted sex offender Jeffrey Epstein leveraged ties with ...