Description Before Darwin .
before Lewis and Clark .
there was Alexander von Humboldt.
Explorer.
Naturalist.
All-around genius.
Lost hero of science.
In his time, Alexander von Humboldt (1769-1859) was world-famous.
Why? He led one of the first major scientific expeditions into the South American rain forest and another into the wilds of Siberia.
Carrying fragile instruments, he navigated perilous rapids and climbed the volcano of Tenerife.
He observed .