1 “..., astronomers, geologists, and biologists...”

2

3 “..., biologists and geologists are increasingly able to pre­ sent quantitative analyses...”

4 “.... This is no mean task in an academic world where you are usually either this or that, such as either a biologist...”

5 “...THE STUDY OF THE BIOSPHERE The term 'biosphere' first appeared in the works of the French biologist...”