A new pathway for methane formation in the oceans has been discovered, with significant potential for advancing our understanding of greenhouse gas production on Earth, scientists believe.
An abrupt release of methane, a powerful greenhouse gas, from ice sheets that extended to Earth's low latitudes some 635 million years ago caused a dramatic shift in climate.
More than 40 percent of the world's oceans are heavily affected by human activities, and few if any areas remain untouched, according to the first global-scale study of human influence on marine ecosystems.
Zigzagging some 60,000 kilometers across the ocean floor, Earth's system of mid-ocean ridges plays a pivotal role in many workings of the planet: in plate-tectonic movements, heat flow from the interior, and the chemistry of rock, water and air.
... land-breeding frog species on Caribbean islands, including the coqui frogs of Puerto Rico, originated from a single frog species that arrived on a sea voyage...
