Also, where does your identity come from? Your memory, of course.

You can make a stack high enough to reach the moon and back, and only then will you have used your 100 billion hamburgers. This is terrifying news to cows.

This influential, yet controversial idea requires that the mixture of species on Earth at any moment acts as a collective organism that continuously (yet unwittingly) tunes Earth's atmospheric composition and climate to promote the presence of life... But I'd bet there are some dead Martians and Venusians who advanced the same theory about their own planets a billion years ago.

There's nothing a teacher likes better than ten minute videos. It's not the whole class, but it's not too short, it's enough to wrap a lesson plan around.

It seems that we're better at finding someone to blame for our problems than we are at finding creative solutions to fix them.

Give a kid a book, and you change the world. In a way, even the universe.

Your center of mass is a place you cannot visit but you always carry with you. Like memories, it is part of life's baggage.