The Doomsday Clock now stands at 89 seconds to midnight, the closest to catastrophe in its nearly eight-decade history.

In three quarters of an hour there are 45 minutes. It's useful to be able to work out time durations with digital clocks too. When we have bigger time durations to calculate, we can think in full ...

Other cool features of this mid-priced sunset alarm clock are the variable duration of the sunrise or sunset simulations (20, 30, or 45 minutes), a light-sensitive clock display that brightens ...