Environmentalist is often a term used to describe impassioned tree huggers but the word literally means someone who studies the environment so environmentalists can be scientists as well. An ecologist studies the environment and an environmentalist wants to save the environment.
NEIL DEGRASSE TYSON: Just in case our human bodies can't live forever, this computer scientist is trying to design virtual replicas, avatars, that will. JASON LEIGH: An avatar is an instance of yourself that's digital, that will never die. NEIL DEGRASSE TYSON: Jason knows he can't really make you live forever, but he can use computers to preserve your thoughts, memories and even the way you look, for eternity.
End of Life. When you want to live a long and healthy life, there are things you can modify as well as things you can't. While you couldn't choose your genes, you can make choices that will reduce your health risks and possibly add years to your life. These six lifestyle modifications are ones that have the best evidence of giving you more healthy years.