Penguins have no external genitalia. Even as adults, the males and females can be difficult to tell apart.
Some reviews that try to make a book look bad are so ill-informed and malicious that they actually make a good book look better.
French philosopher René Descartes conceived of living things as complex machines, a concept now known as the “machine metaphor.”
Rick Sternberg and I agreed that this was one of the best conferences we had ever attended.
If you want your sons and daughters to be well educated about evolution, then hope their biology teachers don’t rely on materials from the Genetic Science Learning Center.