I only vaguely recall the show, but it does have nostalgic value to me. I'm sure it was quite important to me, when I was a kid. Anyway, it was a good way to teach kids about science and then reward them with a little Bloodhound Gang mystery (Retro Junk; Wikipedia); rather like "Mathnet" at the end of each episode of Square One. There were a few different sets of hosts over the years. I don't really know what else to say, but I'd probably enjoy watching old episodes someday, but I very much doubt that'll ever happen.