February 22

Abul Kalam Azad, author of the Qur'an commentary Tarjuman al-Qur'an, died in Delhi.

Heinrich Hertz, the German physicist who generated and detected the radio waves predicted by Maxwell's equations, was born in Hamburg; the unit of frequency bears his name.

Scientists at Scotland's Roslin Institute announced Dolly, a sheep cloned from an adult cell by nuclear transfer and the first mammal so produced, born the previous July.