My first occupation was to map the country.

I profess accurately to describe native Africa - Africa in those places where it has not received the slightest impulse, whether for good or evil, from European civilisation.

So is the savage buffalo, especially delighting in dark places, where he can wallow in the mud and slake his thirst without much trouble; and here also we find the wild pig.

Twins are usually hailed with delight, because they swell the power of the family, though in some instances they are put to death.

I love the idea that if you're going to travel through time, you do it in this insanely dangerous car travelling at 88 miles per hour.

When you are doing a site that you understand is not making money, you kind of understand when times get challenging or there is a new economic climate, you will be scrutinized very closely.

One of the big things about space exploration is that it is as expensive as it is complicated, and you need all the countries of the world to help if you want to accomplish big goals.

Today I still feel like the most illiterate person ever to have roamed the campuses of Wellesley and Harvard, where I later transferred. I remain intimidated by all the books I haven't read, but over the years I've come to realize that being a student is a lifelong adventure.