BBC3y
The 12 and 24 hour clock
The first 12 hours of the day, from midnight to midday , are called AM ... saying AM and PM though - for this, we use the 24 hour clock. The 24 hour clock always uses 4 digits, and we use this ...
Bulletin of the Atomic Scientists2y
PRESS RELEASE: UN Sec. General Guterres says Doomsday Clock is a sign for leaders to “get to work”
The Doomsday Clock is now 90 seconds to midnight, which means 90 seconds to total global catastrophe. This is the closest the clock has ever stood to humanity’s darkest hour – and closer than even ...
BBC3y
The 12 and 24 hour clock
The first 12 hours of the day, from midnight to midday , are called AM ... saying AM and PM though - for this, we use the 24 hour clock. The 24 hour clock always uses 4 digits, and we use this ...