-
Proposed that slow-acting geological forces shaped the planet and it is millions of years old.
-
-
Predicted that left unchecked, the human population will grow beyond the space and food needed to sustain it.
-
Published his hypotheses of the inheritance of acquired traits.
-
Set sail on teh HMS Beagle.
-
Explained that over long periods, the same processes affecting Earth today have shaped Earth's ancient geological features.
-
Wrote to Darwin, speculating on evolution by natural selection, based on his studies of the distribution of plants and animals.
-
Publishes On the Origin of Species.