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Climate Engineering: Minor Potential, Major Side Effects
Topic: Climate
Summary: Researchers show limitations and side effects of large-scale climate intervention.

Ancient 'Great Leap Forward' for Life in the Open Ocean
Topic: Origin & Evolution of Life
Summary: Researchers studying genomic data of cyanobacteria have revealed new clues about the evolution of complex life on Earth.

A River of Plasma, Guarding Against the Sun
Topic: Spaceship Earth
Summary: MIT scientists identify a plasma plume that naturally protects the Earth against solar storms.

Predicting Extinctions with Climate Change
Topic: Climate
Summary: A new NASA-funded study shows that the extinction risks brought about by climate change are not only high, but also predictable.

New Insights into the Origin of Birds
Topic: Origin & Evolution of Life
Summary: A new study suggests that flight in birds arose through several evolutionary steps, which began to occur at least 20 million years before the first bird.

From Soup to Cells: Measuring the Emergence of Life
Topic: Origin & Evolution of Life
Summary: Astrobiologist Sara Walker is exploring ways to measure the transition from non-living to living matter. Her approach could broaden our understanding of how unique--or common--life might be in the universe.

Volcanoes Contribute to Recent Warming 'Hiatus'
Topic: Climate
Summary: Volcanic eruptions in the early part of the 21st century have cooled the planet, according to a new study. This cooling partly offset the warming produced by greenhouse gases.

Alien Moons Could Bake Dry from Young Gas Giants' Hot Glow
Topic: Cosmic Evolution
Summary: A big problem for otherwise habitable moons is the heat radiating from their gas giant planets.

Oldest Bit of Crust Firms Up Idea of a Cool Early Earth
Topic: Earth
Summary: With the help of a tiny fragment of zircon extracted from a remote rock outcrop in Australia, the picture of how our planet became habitable to life about 4.4 billion years ago is coming into sharper focus.

Ask NASA Meteor Experts Your Questions
Topic: Meteorites, Comets and Asteroids
Summary: NASA meteor and fireball experts Dr. Bill Cooke, Danielle Moser and Rhiannon Blaauw will answer questions on beginning at 1 p.m. CST Thursday, March 6, on the Reddit "IAmA" forum.

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