Résultats lu par "John Kricher" dans Toutes les catégories

An esteemed professor of biology at Wheaton College, John Kricher leads a fascinating discussion of the approximately 10,000 species of birds that share our world. In these engaging lectures, Kricher expands on such topics as bird anatomy, the mechanics of flight, migration, reproduction, and song. The professor's lively presentation demonstrates how understanding the traits, life cycle, and evolution of birds is critical for an understanding of the origins and evolution of life on earth - and why conservation plays a vital role in the environment's delicate balance.

Renowned ornithologist John Kricher presents an absorbing analysis of the diverse ecosystems that exist on Planet Earth. He provides a factual study of the many fragile and threatened portions of our biosphere while describing the interaction between each system and the effect of man's presence in these ecosystems. Professor Kricher also explains the amazing variety of flora and fauna that inhabit the individual ecosystems and addresses current ecological issues facing mankind.

Before their extinction, dinosaurs dominated Earth's terrestrial habitats for about 160 million years. They present the ultimate puzzle in forensic science, but we have learned a great deal about them in the last 50 years. This lecture series will explain the evolutionary and ecological relationships among dinosaurs, what it might have been like to be present in their time, and the question of what ultimately brought about the total extinction of dinosaurs at the end of the Cretaceous Period.