For relatively modest amounts of sulfur dioxide injected into the atmosphere, you could easily cool Earth by 1% or more, if you want.

One of the problems with posing a 'bold new plan' is that you can't just extrapolate from previous plans.

Nobody wants a prediction that the future will be more or less like the present, even if that is, statistically speaking, an excellent prediction.

Most estimates of the mortality risk posed by asteroid impacts put it at about the same risk as flying in a commercial airliner. However, you have to remember that this is like the entire human race riding the plane - it is one of the few risks that really could wipe us all out.

What you do on a dinosaur expedition is you hike and look at the ground. You find bones sticking out of the dirt and, once you see something, you dig.

Cooking is for chefs. Science informs us and lets us cook while knowing what we are doing, but it is not a replacement for the skills of a chef.

Near Marseilles in the south of France, bouillabaisse is a cult food. In Toulouse and Carcassonne, the bean-based stew cassoulet is a cult food. Spain has paella and a number of others. Italy has so many, its cuisine is practically defined by them.