How many standard time zones

Different countries have different time. How are these determined? Is there a timer in a particular place where everyone's ...

How many muscles does it take to smile 17,31,57?

How many days does it take for saturn to revolve around the sun?

how many faces does a rectangular prism have? And how many vertices

How many people have a non-standard number of balls?

So in level 1: 2 electrons level 2: 8 level 3: 18 level 4: 32 ? an element with an atomic number of 59 how many ...

I know that you can travel forward in time by traveling close to the speed of light, by spending time on different planets, b...

If you could would you go back in time to meet the rest of your family that you never met like family from all over the world...

How many atoms is an average person made up of. I know that the Universe contains about 10^80 atoms. Does anyone know how m...

What is the name given to many of the elemnts that have more that one oxidation number?? is it isotopes?