phil alvirez's blog View Details
Archive for October, 2018
Posted by phil alvirez | Oct 05, 2018 @ 12:23 PM | 18,722 Views
we are surrounded by them.
we could not live without them.

but, do we have an idea of what they are, and how they do what they do?
searching, i found this, that was very enlightening.
i hope it will be to you too.
or at least add something to what you already knew:

and more: