Reasons to Believe

TNRTB Classic: Fine-tuned Oxygen Levels for Human Life

If oxygen is vital for humans, why does it comprise only 20 percent of the atmosphere? Studies of ancient charcoal formations show that the atmosphere contained an even greater (and more variable) fraction of oxygen a few hundred million years ago. However, the increased oxygen content led to a greater threat of massive fires. Humanity arrived on the scene when the oxygen fraction stabilized around the optimal value (for human life) of 20 percent. This just-right timing points to a supernatural Designer.

Subjects: Geophysical Design

Dr. Jeff Zweerink

While many Christians and non-Christians see faith and science as in perpetual conflict, I find they integrate well. They operate by the same principles and are committed to discovering foundational truths. Read more about Dr. Jeff Zweerink.