I had a similar "How far we have come" thought today. I sent my cousin a Facebook message who lives 13,000KM away in Oz, she literally replied in 10 seconds. Sounds quite trivial and we do it all the time. This would have easily taken two months as recent as 100 years ago!

Modern humans (like you and me) have been around for 200-300 million years and this has never been remotely possible!