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Astrobiology
Red dwarfs are the Universe's most common star type. Their flaring now makes potentially Earth-like worlds uninhabitable, but just you wait.
Big Think spoke with astronomer David Kipping about technosignatures, "extragalactic SETI," and being a popular science communicator in the YouTube age.
Organic compounds can form through simple chemistry alone — making the search for true biosignatures trickier than it seems.
Questions about our origins, biologically, chemically, and cosmically, are the most profound ones we can ask. Here are today's best answers.
The fear of unleashing forces beyond control has haunted science for centuries.
The red planet, Mars, may once have been teeming with life, just as Earth is today. Finding "organics" on Mars, however, doesn't mean life.
The most common type of exoplanet is neither Earth-sized nor Neptune-sized, but in between. Could these haze-rich worlds house alien life?
NASA's 1958 charter's top priority was, "the expansion of human knowledge of phenomena in the atmosphere and space." Is this how it ends?
The Universe was born incredibly hot, and has expanded and cooled ever since. Could life have begun back when space was "room temperature?"
In the search for life in the Universe, the ultimate goal is to find an inhabited planet beyond Earth. How will we know when we've made it?
At the end of July, hundreds of scientists convened to plan NASA's upcoming astrophysics flagship mission. Will the US allow it to happen?
Somewhere, at some point in the history of our Universe, life arose. We're evidence of that here on Earth, but many big puzzles remain.