Probing how microbiomes affect our health

More than half the cells on or in our bodies are microbes. Microbes help us digest food, affect our moods, and defend against invading pathogens.

NASA pushes back crewed Moon landing to 2025 or later

The United States will send a crewed mission to the Moon "no earlier than 2025," NASA chief Bill Nelson told reporters on Tuesday, officially pushing back the launch by at least a year.

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