Valerie’s Reviews > Infinite Life: The Revolutionary Story of Eggs, Evolution, and Life on Earth > Status Update

Recent research suggests that nonavian dinosaur embryonic development and egg incubation took much longer than that of most modern birds (6 months mentioned vaguely in the book).

Birth of the Red Kangaroo (1965), "puggles", likely no marsupial bats and whales due to the very unstreamlined shape of the embryo which would have to change greatly on the way to adult development, and the book makes a significant mistake in implying exothermic pterosaurs and a diurnal Anurognathus.

*though, also: syncytin

Jurassic: placentas (thought keep shark/Devonian fishes' umbilica-womb connection in mind).

Placentas are miraculous, but also kind of horrifying.

*conifers, *Oak gall ink

Permian: Holometabolous metamorphosing insects, galls recorded in the fossil record (first in ferns and horntails, later in seeds ferns and confiers. *Ink-gall as an important tool for writing in Western civilization.

Cambrian innovations: MAAs for UV protection, egg-fixing strategies, the differentiation early in life of germ and soma lines.