Black holes are very exotic objects. Technically, a black hole puts a huge amount of mass inside of zero volume. So our understanding of the center of black holes doesn't make sense, which is a big clue to physicists that we don't have our physics quite right.
How do you observe something you can't see? This is the basic question of somebody who's interested in finding and studying black holes. Because black holes are objects whose pull of gravity is so intense that nothing can escape it, not even light, so you can't see it directly.
I'm interested in finding whether or not there is a really massive, what we like to call 'super massive' black hole at the center of our galaxy. And the reason this is interesting is that it gives us an opportunity to prove whether or not these exotic objects really exist.
The pace of digital innovation is astonishing. It's impossible to imagine life without the web, smartphones, social networks. And yet the consumer products and everyday objects all around us are still essentially dumb.
I am not normally a fan of organised tours: few public figures are, feeling themselves objects of constant curiosity.
Our knowledge of animals and their behaviour has come a long way. We can no longer justify imprisoning them, robbing them of everything that is natural and important to them and turning them into objects of ridicule for our amusement.
I think of it as the lasagna approach to writing because I'm always adding layers. I'll sometimes do it layer by layer, with dialogue, attribution, action, objects in the scene, setting... It can be sometimes that delineated.
We need to empower all women, both financially and socially, to give them the tools to support themselves and their families. We need to start seeing them as contributors to society, as assets, not as objects of pity or, even worse, objects of shame.