The cosmological constant problem

Were the seeds of Civil War already written into the American Constitution?

The land Down Under seems ready-made for soul-stirring adventures. Its 16,000 miles of coastline are one long playground, with vertiginous cliffs riddled with hiking trails and reefs ripe for diving. There’s ancient flora and unique wildlife hiding in the rainforests, and cities that offer every activity under the sun. So pick up your hiking boots, paddle or flippers and get outdoors

From dark matter to deep-sea crabs, science still can’t fully explain these strange quirks of nature

T hink of Florida and you’ll likely conjure up images of Miami Vice, David Beckham’s football club or theme parks like Walt Disney World and Universal Studios. But drive an hour south along US Route 1

TEERAYUT CHAISARN/GETTY AMBULATORY SURGERY CENTERS CONTINUE to ...

As we sat at a well-worn wooden kitchen table in the leafy Moseley suburb of Birmingham, Judith Yates pointed at a spreadsheet on her MacBook. Each row told a clear story, painstakingly collected by t