LeVar Burton is guest editing Scientific America’s website today. Do not adjust your screens: he controls the vertical and the horizontal, the blog posts and the discussion threads, the homepage and the editorials. He’s also livetweeting from @sciam and his first reading assignment of the day is about comets and the seeing of said celestial phenomenon.

The magazine is so enthusiastic about Burton’s day of guest editing — and of course his tremendous ability to bring attention to causes of note, particularly lifelong education — that they’re offering a promotional subscription, in honour of Burton. Use the code EDUSALE to get 50% off twelve digital issues and their special Education Issue for free.

Click over to scientificamerican.com to see what the Star Trek and Reading Rainbow star thinks are the must-read science stories of the day.