North America
The decrease in species richness in North America
The species richness map shows historic and current species richness for 17 species that experienced range contractions over more than
Read More
North America 550 million years ago
North America 100 million years ago 550 million years of North America in 30 seconds See also: – What did
Read MoreWinter severity index & Average length of winter in days
Winter severity index points according to methodology by Boustead et al. 2015: The Accumulated Winter Season Severity Index. J. Appl.
Read More