The internet can be used for pointless endeavours like competing for the most 'friends'.... but it can also be used as a powerful tool to learn and understand the world.
I give you ... the late... the great ... Professor Albert Bartlett
https://youtu.be/F-QA2rkpBSY
On a lighter (though not necessarily less useful) note...
https://youtu.be/Kb9nQj4u7EI