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So you got the vaccine. Can you still infect people? Pfizer is trying to find out.

Sebastián De Toma joined Pfizer’s clinical trial last year, getting his shots in August and September. The Argentinian journalist still doesn’t know if he got the real covid-19 vaccine or the placebo, but on Sunday, January 31, the trial doctors called him with a new offer. Would De Toma be willing to undergo a series […]

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We’re living in a golden age of sample return missions

Observing space rocks from afar is all very well, but sometimes you need to get up close. The biggest questions in space science—how the solar system formed, how it led to life on Earth, and whether there’s ever been life on other nearby worlds—can really only be answered with direct study of the materials from […]