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First Ring System Around Asteroid
Topic: Meteorites, Comets and Asteroids
Summary: Scientists have discovered that the remote asteroid Chariklo is surrounded by two dense and narrow rings. The origin of these rings remains a mystery, but they may be the result of a collision that created a disc of debris.

A New Structure in Earth's Radiation Belt
Topic: Spaceship Earth
Summary: Physicists have discovered a structure in Earth's inner radiation belt that could pose a threat to future human explorers and communication satellites.

Large Predators Roamed Oceans Soon after Permian Extinction
Topic: Biosphere
Summary: A new study shows that large predators roamed the oceans soon after the End-Permian extinction--suggesting that ecosystems recovered more rapidly than previously thought.

Unlocking Darwin's 'Mystery of Mysteries'
Topic: Origin & Evolution of Life
Summary: Hybrid incompatibility -- failure of 2 closely related species to produce offspring that survive and reproduce -- has puzzled scientists beginning with Charles Darwin.

Global Warming May Increase Methane Emissions from Freshwater Ecosystems
Topic: Climate
Summary: New research suggests that rising global temperatures will increase the quantity of methane emitted from freshwater ecosystems to the Earth's atmosphere - which could in turn lead to further warming.

A Hypothesis for Continued Habitability on Earth
Topic: Geology
Summary: Throughout Earth's history, geological cycles may have acted to provide a balance of hot and cold that has helped maintain our planet's habitability.

Ancient Food Webs Show Modern Structure after Mass Extinction
Topic: Biosphere
Summary: A new study reveals that an ancient food web was organized much like modern food webs--despite the 48 million years of evolution that separate them.

Astronomers Looking for Clues to Water's Origins
Topic: Cosmic Evolution
Summary: What happens at the birth of a star may determine whether water is commonplace or rare in other solar systems.

Solar System's Edge Redefined
Topic: Outer Solar System
Summary: Astronomers have extended the edge of the known Solar System by spotting a new dwarf planet. The finding also indicates the possible presence of a giant planet somewhere in the dark, cold region of space far from the Sun.

The New Wave in Exoplanet Astronomy: Near-Earths in the Near-Visible
Topic: Missions
Summary: Astronomers are getting closer to using ground-based telescopes to detect Earth-like planets in visible wavelengths.

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