Do technological civilizations depend on atmospheric oxygen?

Nearly 2 million years ago a species of upright apes known as Homo erectus began to use fire. It was a gradual process, from opportunistic users of natural fires to masters able to craft flames from flint and tender. We are ...

Ariane 6: Launch system tests progressing well

Teams preparing Ariane 6 for its inaugural flight successfully completed for the first time a launcher preparation and countdown sequence, on 18 July at Europe's Spaceport in Kourou, French Guiana.

Ethylene boosts plant yield and vigor, study shows

Exposing seedlings to ethylene in darkness increases size and vigor, in a finding with implications for agriculture. Farmers have worked to increase crop yields for millennia, and the quest remains urgent as the human population ...

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