Synergy Systems

Arrays vs Lists
The key difference between a list and
an array is that an array is fixed size
while a list is dynamic -- you can add
new elements to a list, but to add a
new element to an array you need to
create a new larger array and copy the
old elements.
Arrays are a little leaner and more
efficient if you don't need dynamic
resizing, but lists are usually more
convenient and the performance
difference rarely matters for most
applications.

https://www.youtube.com/watch?v=NNypFfPYWWs

If you had a light bulb on the moon connected to a switch in your bedroom, it would take only 1.26 seconds for that bulb to light up, 238,857 miles away.