Is there life on Mars today and where?

In a comment published today in Nature Astronomy, Dr. Nathalie Cabrol, Director of the Carl Sagan Center for Research at the SETI Institute, challenges assumptions about the possibility of modern life on Mars held by many ...

Bacteria adapt syringe apparatus to changing conditions

Some of the best-known human pathogens—from the plague bacterium Yersinia pestis to the diarrhea pathogen Salmonella—use a tiny hypodermic needle to inject disease-causing proteins into their host's cells, thereby manipulating ...

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