Costa Rica is a marvelous place to enter the atmosphere.

With uranium, it's much easier to put in safeguards to monitor the atmosphere and instruments.

Since the Martian atmosphere is different in some ways, we can take theories that have been developed in the terrestrial case and test whether they work on Mars as well or whether there are areas that need improving.

We've polluted the stratosphere with these chlorine and bromine compounds, and because it's now colder, and because we have this change in the climate, we're getting more ozone loss than we would have gotten in a normal year,

Those with a moral deficit put on a good show, and sleep like a baby.

If you don't have enemies, you don't have character.