I'm no scientist, but does anyone think it possible that there are chemical elements and chemistry in the universe not yet discovered by human science?
I'm thinking about writing a sci-fi story about alien life. Most scientists describe life as being carbon-based, with the possibility of silicon-based life (this last is very much the province of sci-fi writers.) If there were other chemical elements as yet undiscovered, perhaps these too would be conducive to life, which would be of a very different form.