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The list of human impacts on the planet is a long one. We move more earth and stone than all the world's rivers

Earth is the planet of the plants--and it all can be traced back to one green cell. The world's lush profusion of photosynthesizers--from towering redwoods to ubiquitous diatoms--owe their existence to a tiny alga eons ago that swallowed a cyanobacteria and turned it into an internal solar power plant. [More]

Countless Sci-Fi fans vividly remember the famous scene in Star Wars in which the Death Star obliterates the planet Alderaan.

Can the planet handle more than 7 billion humans? [More]

Using one of the most sensitive neutrino detectors on the planet, an international team including physicists Laura Cadonati and Andrea Pocar at the University of Massachusetts Amherst are now measuring the flow of solar neutrinos reaching earth more precisely than ever before.

Using one of the most sensitive neutrino detectors on the planet, an international team including physicists Laura Cadonati and Andrea Pocar at the University of Massachusetts Amherst are now measuring the flow of solar neutrinos reaching earth more precisely than ever before. The detector probes matter at the most fundamental level and provides a powerful tool for directly observing the sun's composition.

It's ubiquitous. It's universal. And it's understood—not! Water's choices in a given situation often defy scientific predictions.