The Day the World Agreed to Heal the Sky
On September 16, 1987, diplomats signed the Montreal Protocol, which grew into the only universally ratified treaty in UN history — and it is why the ozone layer is healing today.
Tagged: science
The Mold That Changed Medicine
On September 28, 1928, a messy scientist came back from vacation to find a strange mold on a forgotten petri dish — and the age of antibiotics began.