lunar eclipse view from Moon red ring Earth

From the Moon, Earth eclipses the Sun

During a lunar eclipse, Earth moves between the Moon and the Sun. Seen from the Moon, Earth blocks the Sun, and its atmosphere looks like a red ring around the dark planet.

Norovirus can infect someone with an extraordinarily small dose

Norovirus spreads easily through contaminated food, water, surfaces and close contact. Experiments and outbreak investigations suggest that very small numbers of infectious particles can sometimes establish an infection. That helps explain why the virus spreads rapidly in places such as cruise ships, schools and care homes.

Peer review does not prove a claim true

Peer review means specialists judged a study worth publishing; it does not prove its claims are true. Confidence can grow when later research supports a claim and other researchers successfully build on it, but scientific conclusions can still change.

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lunar eclipse view from Moon red ring Earth

From the Moon, Earth eclipses the Sun

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