If Charles Darwin could see today's best examples of evolution, would he be elated or depressed?

An animal wouldn't grow larger than an insect without specialized equipment designed to transport oxygen to and carbon dioxide from cells deep inside its body. Fortunately, thousands of different animal kinds have been outfitted with tiny machines called hemoglobins that directly and specifically interact with individual oxygen molecules, making larger body sizes possible.

Some Tibetans live at altitudes of 14,000 feet. Other than a few genetic differences, they are similar to Han Chinese, who live much closer to sea level. It is believed that ancient Han peoples migrated to Tibet and were able to adapt to the very thin air at this high altitude. But what kind of adaptation was necessary for this, and how did it occur?

The human genome has become a leading area of biological investigation. Its massive amounts of data have been digitized, which allows the information to be more easily studied. Much of genomic function remains a mystery, so new discoveries are common--and often quite surprising to the researchers making them.

In the late 1800s, a Darwinian concept called "transmutation of species" revolutionized historical biology. Instead of viewing animal species as the products of special creation, Darwinists believed that they resulted from a long, repetitive transformation through various "natural" or environmental pressures.