how the internet connects the entire world?

[Michael]

is there any cables or something from brazil to spain for example across the entire ocean or what? how the hell does it work i've been wondering, also phone.. is there some long cables that go every where?
also even if it's Wireless, how does it work? i mean wireless is nothing.. it's only air.. how can it connect such big distances and how does it work?
what are these waves and how these waves work? what is this thing? is it even physical?