lecture: Astronomy

Ok, today I’d like to talk about a planet named by the Romans… It’s the planet they observed moving much faster than any other planet… I guess you know I’m talking about Mercury.

Actually, scientists are only recently beginning to learn more about Mercury.

Well, maybe you can start off this discussion by telling me what you know about Mercury.

It’s the closest to the sun…

lecture: History

- OK, why don’t we start? So… you all probably know about Johannes Gutenberg’s contributions to the technology of printing in 1448… a new kind of printing press included. He has been credited with inventing movable type in Europe first… uh, this was an improvement on the block printing already in use there. And he’s also credited with being the first one to use an oil-based ink. You might wonder, what’s so great about an oil-based ink?