How Earth’s Surface Oxygen Is Optimized for Marine Animals December 27, 2021 Many people no doubt take for granted that we enjoy a 21% oxygen level at Earth's surface. Variable rates in Earth's history have coincided... Design by Hugh Ross Read
Naturalistic Evolution Challenge: Gaian Bottleneck Gets Narrower June 17, 2019 Scientific advances continue to demonstrate our improbable planet’s fine-tuned features. In a recent issue of Science, a team of scientists led by Francis Macdonald... Evolution by Hugh Ross Read