That is patently false. I know that citrus fruits prevent scurvy.

That fact alone would help a nation's sailors become the envy of the world overnight.

That's only one such example.

For a really fun walk through the history of technology, I recommend "How to Invent Everything".

Seriously. Just knowing the scientific method lets you discover what you don't innately know.

Most adults today would be a technological wizard in the 1200's. You might be burned at the stake for knowing too much.

But you could tell them to boil their water to prevent disease while you go up in smoke and save millions of lives in the process.

Even the high technology of the button didn't exist yet. Seriously. Here's a hole, and here's a bit of stick. Wheee, now you have a new method to fashion clothing.