BBC2 年
The 12 and 24 hour clock
A clock with hands (an analogue clock) shows us the numbers 1-12. There are 24 hours in one day, so we measure time by splitting the day into two halves. The first 12 hours of the day, from ...
BBC2 年
The 12 and 24 hour clock
A clock with hands (an analogue clock) shows us the numbers 1-12. There are 24 hours in one day, so we measure time by splitting the day into two halves. The first 12 hours of the day, from ...
The redesigned Doomsday Clock finally has a look to match its message
The world might be falling to pieces, but at least we’re counting down to doom in style. The Doomsday Clock is perhaps the ...