Robert McCall: an artist you should know. This is another entry in my continuing series of “Artists You Should Know”. By NASA – http://spaceflight.nasa.gov/gallery/images/apollo/apollo15/html/s71-41694.html, Public Domain, Link Introduction In the realm of artistic visionaries, there are few who possess the ability to transport us beyond the boundaries of our world and into the vast reaches of the cosmos. Among them stands Robert “Bob” McCall, a renowned illustrator whose brushstrokes have