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Astronomers Might Have Just Solved a Key Mystery About the Origin of Life

If a massive solar storm struck the Earth today, it could wipe out our technology and hurl us back to the dark ages. Lucky for us, events like this are quite rare. But four billion years ago, extreme space weather was probably the norm. And rather than bringing the apocalypse, it might have kickstarted life.

New Solution to Fermi Paradox Suggests Alien Life Goes Extinct Early

We have yet to discover a single trace of alien life, despite the extremely high probability that it exists somewhere. This contradiction is popularly known as the Fermi Paradox. A new theory attempts to solve this conundrum by suggesting that habitable planets are quite common in our galaxy, but nascent life gets…

Mysterious Wow! Signal Came From Comets, Not Aliens, Claims Scientist

In 1977, astronomer Jerry R. Ehman observed a data signal so unique he drew a red circle around it and wrote “Wow!” to emphasize the discovery. The source of the signal was never identified, leading some to say it was aliens. But a new study suggests it wasn’t aliens at all—but rather a hydrogen cloud caused by comets.

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Everything You Need to Know About Cassini's Final Enceladus Flyby

An important chapter in our exploration of the solar system concludes tomorrow, when NASA’s Cassini probe makes its final close flyby of Enceladus, an icy moon orbiting Saturn with a global ocean beneath its surface. Cassini has already collected samples to determine if Enceladus’ seawater might be habitable—but we…

An Earth-Sized Neighbor May Be the Most Important Exoplanet Yet

Astronomers have discovered a rocky, Earth-sized planet 39 light years from home—right in our cosmic backyard. With a surface temperature of 440 degrees Fahrenheit, GJ 1132b is more of an intergalactic furnace than a vacation prospect. Yet some are hailing it “the most important planet ever found outside our solar…