Orbiter pair expands view of Martian ionosphere

Like Earth, Mars is surrounded by an ionosphere—the part of its upper atmosphere where radiation from the sun knocks electrons off of atoms and molecules, creating charged particles. The Martian ionosphere is complex and ...

Where do Antarctic submarine canyons get their marine life?

Submarine canyons around Antarctica tend to have less sea ice, higher sea surface temperatures, and more biomass such as phytoplankton blooms than the shelves they cut into. Phytoplankton blooms feed Antarctic krill, making ...

Seaweed surges may alter Arctic fjord carbon dynamics

In high-latitude Arctic fjords, warming seas and reduced sea ice are boosting seaweed growth. This expansion of seaweed "forests" could alter the storage and cycling of carbon in coastal Arctic ecosystems, but few studies ...

Proposed experiment could clarify origin of Martian methane

Over the past decade, the Curiosity rover has repeatedly detected methane on the surface of Mars. This gas is often produced by microbes, so it could herald the presence of life on the red planet. But skeptics have postulated ...

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