Growing up in Egypt, I never saw the country as divided as it is today. We now have two main political groupings: the Islamist parties and the civil, or liberal, political parties.

Curiosity - the rover and the concept - is what science is all about: the quest to reveal the unknown.

The soft power of science has the potential to reshape global diplomacy.

In the Middle East, it is clear that peace will never be reached without solving the Israeli-Palestinian conflict. A two-state solution must be found and enforced.

The pen is an instrument of discovery rather than just a recording implement. If you write a letter of resignation or something with an agenda, you're simply using a pen to record what you have thought out.

There's no law of physics that says we have to be an unsustainable society - in fact, quite the opposite. The planet's ready to work with us if we're ready to think differently, but we do have to make that jump and start to do things in new ways.

The USDA is tasked with managing and promoting agriculture - including the well-funded animal agriculture industry - so it's pulled into a tug-of-war every time the dietary guidelines are re-evaluated.

My father worked in a factory and as a child it felt very secure. It felt very secure because everybody had work, the schools were free, so there was a security of knowing that the war had finished and families would come together again.