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?

People don't generally picture ducks as having lived alongside dinosaurs. After all, it is widely assumed that birds evolved from dinosaurs over a period of millions of years. But fossils discovered two decades ago reveal clear evidence that they lived at the same time.

Canadian scientists have found a massive dinosaur fossil graveyard in Alberta containing so many bones that it calls into question the standard stories of slow and gradual dinosaur fossil formation. No mere river flood could account for so many casualties. So, the researchers proposed that the cause was something much more violent.

Genes are portions of DNA that contain just the right codes to specify proteins, which make everything in cells work. But how does the cell know which protein should be manufactured, how often, how much, or how fast? If it doesn't get these right, then cellular disaster results.

Science is often portrayed as a pure pursuit of knowledge, with well-trained individuals who are dedicated to the highest standards of intellectual and professional achievement.