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.

Something my father dearly loved is the scientific method, and it's founded in this element of humility. The idea is that you pursue the truth wherever it goes; you need to evidence, and you can - you see if it's repeatable.

This is a global fight to get the right people in the right place and we're talking about people with PhDs in engineering, computer science, mathematics.

I have this rather amazing report which, roughly speaking, says I was the worst student the biology master had ever taught.

Science should always be in the business of attempting to disprove itself.

Reality TV is here, it's been here really since the Carol Levis Discovery Show in 1957. It's never changed. It just looks a bit different.