Evolution

Biology versus Theology

Man's Place in the Universe A Study of the Results of Scientific Research in Relation to the Unity or Plurality of Worlds, 3rd Edition

Biology

Evolution and Adaptation

The Conditions of Existence as Affecting the Perpetuation of Living Beings

Life's Dawn on Earth

The Baculum in the Chipmunks of Western North America

Applied Eugenics

From Atoms to Awareness

Neanderthals and Atlantis

Dematerializing Evolution

What are Time, Knowledge, Consciousness, and Vitality

The Factors of Organic Evolution

The Ancestry of Modern Amphibia: A Review of the Evidence

The Kingdom of Man

The Biological Problem of To-day: Preformation Or Epigenesis

At the Deathbed of Darwinism: A Series of Papers

Remarkable Creatures

Essays on Darwinism

An Expository Outline of the “Vestiges of the Natural History of Creation”