A scientist found CO2 traps heat in 1856 — three years before the man credited for it
In 1856, Eunice Foote sealed air and carbon dioxide separately in glass cylinders and set them in sunlight. The CO2 cylinder heated faster and stayed warm far longer after sunlight was removed. She concluded a CO2-richer atmosphere would give Earth a higher temperature — three years before John Tyndall's experiments earned him credit for discovering the greenhouse effect. A male colleague read her paper aloud; women weren't allowed to present their own work.