Climate change will fundamentally challenge the world's urban centers. Three cities — San Diego, Milan and Jakarta — offer lessons for how to adapt to a warming planet.
Researchers have identified 12 ancestral plant species from an early Eocene fossil assemblage in Tasmania that once formed part of a giant, circumpolar forest.
New research suggests that black holes may actually be "frozen stars," bizarre quantum objects that lack a singularity and an event horizon, potentially solving some of the biggest paradoxes in black ...