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Musical Chairs around the Periodic Table
Topic: Extreme Life
The claim of a microbe that swaps arsenic for phosphorus may be questionable, but alternative chemistries for life is still a question worth considering, say researchers.

Asking About Arsenic
Topic: Extreme Life
On December 2, NASA held a press conference to announce the discovery of a bacterium that has a novel biochemistry. The research made headlines around the world and sparked a great deal of scientific debate.

The Three Ages of Mars
Topic: Extreme Life
While no place on Earth is exactly like Mars, various spots are quite similar to the red planet at different times in its past. A new study details the martian ages and the places on Earth that best resemble them.

Thriving on Arsenic
Topic: Extreme Life
Geomicrobiologist Felisa Wolfe-Simon has discovered a bacterium that appears able to use arsenic instead of phosphorus in its DNA. The definition of life on Earth may need to be rewritten.

Tracking Viruses Back in Time
Topic: Extreme Life
How long have viruses been around? No one knows. Scientists at Portland State University have begun taking the first steps toward answering this question.

Diving Robot Discovers Life in the Slow Lane
Topic: Extreme Life
Scientists have found amazingly diverse microbial life in the world's deepest water-filled sinkhole, even down where sunlight can't reach. The discovery adds new insight into life´s ability to thrive in Earth´s most extreme environments. This research also could aid the search for life elsewhere in our solar system, such as on Jupiter´s moon Europa.

Life after Catastrophe
Topic: Extreme Life
Scientists studying deep-sea hydrothermal vents have found that larvae travel hundreds of miles to re-colonize these harsh locations after a volcanic eruption. The new study could challenge existing beliefs about how life adapts to extreme environments.

Water, Water Everywhere, but Not All Drops Have Life
Topic: Extreme Life
The search for life on other planets focuses on water, but researchers argue that – judging from our own planet – a large fraction of water conditions may be inhospitable to life.

Microbial Life in Mars Analog Lakes
Topic: Extreme Life
The first microbiological survey of Mars analog lakes in Western Australia is offering new evidence of the diverse life that could have once thrived on Mars.

Wanted: Easy-Going Martian Roommates
Topic: Extreme Life
Mars is not for the finicky. If something does live there, it's likely going to be similar to the more adaptive life forms on our planet. A group of researchers is studying a particular microbe that they think could be a model for Mars life.
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