The Nature of Things, on CBC (Canada)
CBC; IMDb; Wikipedia

I don't know how much of this I ever watched, but I'm sure I must have at least occasionally seen a bit of it when I was a little kid. To be honest, I don't really remember anything at all about the show except the host, David Suzuki. In fact I don't remember anything about him except what he looks like, and also that I probably always found him likable. I sort of feel like maybe I knew Suzuki from something else, but I doubt it. Also I have this vague impression of there being a robot on the show for some reason. (Looking online now, I see that he did briefly host a children's science show called "Just Ask, Inc." on which he had two different robot cohosts, at different times. So maybe that's what I'm thinking of, even though I don't remember it at all. Damn shame I can't find any pictures from the show.) But anyway, "The Nature of Things" started in 1960, and Suzuki became the host in 1979. And I guess it's still running. It's a show about natural science. Wish I could say more, but at least I had to mention it in passing, because I have a vague sense of nostalgia about the show, or at least about Suzuki himself. Sort of.