Animal Kingdom
Marine Life
A planet whose oceans cover most of its surface, contain most of its biodiversity, and remain, even today, mostly unexplored.
Extinct Species
More than 99% of every species that has ever existed on Earth is already extinct — meaning extinction, not survival, is actually the historical norm.
Animal Migration
A single bird species that logs roughly 44,000 miles a year chasing summer between the Arctic and Antarctic — the longest migration of any animal on Earth.
Insects
The single most numerous and diverse group of animals on the entire planet isn't mammals, birds, or fish — it's insects, by an overwhelming margin.