When evolution skeptics want to attack Darwin's theory, they often point to the human eye. How could something so complex, they argue, have developed through random mutations and natural selection, ...

Why did humans evolve the eyes we have today? While scientists can't go back in time to study the environmental pressures ...

Q: What fascinates you about the eye? A: The eye is an absolutely fascinating organ because it's an organ of extreme perfection, as Darwin has called it. We are able to adjust the focus, we are able ...

Convergent origins of new mechanisms to supply oxygen to the retina were directly linked to concurrent enhancements in the functional anatomy of the eye. In his "On the Origin of Species", Darwin used ...

One of the biggest mysteries of evolution is how species first developed complex vision. Jellyfish are helping scientists solve this puzzle, as the group has independently evolved eyes at least nine ...

Vertebrates exhibit substantial variation in eye size. Eye size correlates positively with visual capacity and behaviors that enhance fitness, such as predator avoidance. This foreshadows a connection ...

Wild cats showcase a stunning diversity of eye colors, proving a mystery for researchers because most wild species are known to have narrow eye color schemes (usually black, brown or yellow). Eye ...

Growing up in Sweden, author J. Arvid Ågren was taught British evolutionary biologist Richard Dawkins' selfish gene theory, which was commonly taught in Europe. When Ågren arrived in North America for ...

This is a preview. Log in through your library . Abstract Variation in eye size is ubiquitous across taxa. Increased eye size is correlated with improved vision and increased fitness via shifts in ...

The fascinating compound eyes of insects consist of hundreds of individual eyes known as 'facets'. In the course of evolution, an enormous variety of sizes and shapes has emerged, often adaptations to ...