In what may not come as much of a shock to many, the Doomsday Clock has inched closer to midnight and is now 89 seconds away ...

There are 12 numbers around a clock face, and each interval between ... In a quarter of an hour there are 15 minutes. In half an hour there are 30 minutes. In three quarters of an hour there ...

Tempo helps Sabrina find half an hour later on a clock face by folding the clock in half. Sabrina meets the athlete, and finds out she can swim around 120 lengths in half an hour. Sabrina works ...