Something I've always wanted to know, but can never seem to test myself...Is there a real advantage to saving up tech points to buy the highest level of the Science tech before all the others? (After, of course, purchasing at least Level 2 of Harvesting, so they don't starve in the process)

I try to save up for the highest level of Science, so that the tech points multiply faster, so that I can get the others more easily, but I can never do it! As soon as I get enough points that would purchase other [lesser] Village Tech, I spend it on those! lol!

In other words, how much do the points increase with each level of Science?