- ... that the discovery of the fossil giant ant Titanomyrma (pictured with a hummingbird) in Wyoming indicates that warmth-loving fauna spread through the north between Europe and America during hot spells in the Eocene?
- ... that the extinct plant species Eucommia jeffersonensis and Eucommia rolandii were both described from fossils in 1997?
- ... that the nearest living relatives of Eosacantha, a fossil tortoise beetle from Colorado, are found in Africa, tropical Asia, and Australia?
- ... that of the three described species in the Eocene bulldog ant genus Avitomyrmex, one species is known only from worker caste individuals?
- ... that the fossil big-headed fly Priabona is named for the age of the rocks in which it was found?