If it isn't too cheeky I'd like to see the reverse too - starting with a few years and going to mega years.

It takes me a long time to figure out what your units are. Can we have a key? Can you highlight when we change units?

I prefer this way round. Your draft was horizontal rather than vertical, right?

I'd like it to be more interactive. Is that possible? If not then I can just move the youtube slider to look at differentparts of the animation.