Parrotfish, for example, secrete a mucous cocoon that ... world beneath the waves and the urgent need to protect it. The 24-hour clock of coral reefs is a testament to nature’s ingenuity and ...

For example, 3.00 pm becomes 15:00. To change a 24-hour afternoon, evening or night time to a 12-hour clock time, subtract 12 from the hours. For example, 18:00 becomes 6.00 pm. The time could be ...

For example, 1:00 AM is written as 0100 hours, while 1:00 PM is written as 1300 hours. Also called the "24-clock," the format is commonly used in industries and professions worldwide in which 24 ...

The time we now use around the world is called Universal time, or UT. It was formalized a century ago — here's how it works.

At 12:20 a.m., James Bond checks his watch; at 6:30 a.m., Meryl Streep hits her alarm clock and this continues, clip after clip, for 24 hours. “The Clock” is currently on at MoMA through Feb. 17.