Trivia

Hard

Atomic Time Is Kept Using Atoms Of What Type?

Einsteinium
Caesium
Uranium
Radium

Answer: Caesium

The exact definition of a second has undergone quite a few revisions over the centuries. The second was originally defined as the second division of the hour by 60 (the first division was the minute).

Loose time keeping well into the 19th century however meant that a second was fairly fluid if it was even measured at all. By 1892 scientists had finally hammered out a more precise definition: the fraction 1/31,556,925.9747 of the tropical year for 1900 January 0 at 12 hours ephemeris time.

That definition was refined for next seventy years or so until the  International Committee for Weights and Measures abandoned the idea of linking the scientific second to explicitly to length of the day. Instead the second would be defined via atomic clock, specifically: the duration of 9,192,631,770 periods of the radiation corresponding to the transition between the two hyperfine levels of the ground state of the caesium-133 atom.

Although atomic clocks have been improved many fold since the 1960s, isotopes of the caesium atom have been keeping time for us ever since.

Trivia

Hard

The Peace Symbol Is A Stylized Representation Of?

Trivia

Hard

Jelly Belly’s Vomit Flavored Jelly Beans Were A Failed Attempt At Making What Flavor?

Trivia

Hard

The Primary Sound You Hear In Chewbacca’s Voice Is A?

Trivia

Easy

The U.S. State With The Highest Number Of French Speakers Is?

Trivia

Easy

In Medieval Europe, Which Of The Following Were Used As Timers?

Trivia

Hard

The Phrase “Bob’s Your Uncle” Comes To Us By Way Of?

Trivia

Easy

Airplane Windows Are Round To Reduce?

Trivia

Easy

What Dangerous Substance Was Used Liberally On Early Movie Sets?

Trivia

Hard

Tamagotchis, The Fad “Pocket Pet” Toy That Swept The Late 1990s, Was Created By What Company?

Trivia

Hard

The First Actor To Accept A Razzie Award In Person Was?