My father was not only a planetary scientist and a great popularizer of science, but he thought very deeply about the world. He was a scholar, he studied history. He taught a class in critical thinking, and he was very, very aware of the directions we might go.

Dad was a difference maker. He reached out to people. He took them by the awe and wonder we feel over the most important questions we can think to imagine. He pulled them away from blind faith, away from pseudoscience, toward a deeper, richer understanding of the universe.

Life in space is impossible,' we're warned, and amidst the hypnotic beauty of these heavens, we become painfully aware of what a hostile environment space is, how unforgiving, how unsympathetic to human desires.

Astonishingly powerful and poignant, 'Gravity' is the rarest of rares: a space survival film informed by a genuine reverence for the awe-inspiring cosmos we inhabit.

So, one of the biggest things about YouTube versus any other platform is the built-in audience and discovery tools.

Filk' is the folk music of the science fiction and fantasy community - you get parodies, you get traditional music that's had the words slightly modified, and you'll also get just original works that have been written about science fiction and fantasy works, or with science fiction and fantasy themes.

I entered Harvard in 1965 not really knowing what I wanted to do. This confusion seems to have lost me a fellowship. G. D. Searle and Company, the pharmaceutical firm, had their home office in Skokie, and they gave a fellowship each year to a graduate from my high school that was going to major in science in college.

We are more dependent on science and engineering than at any other time in history. However, there is plenty of evidence that far too many people are scientifically illiterate, often having been put off science at school.