Living Together: Rocky Intertidal Zone, The: Challenges and Adaptations
The intertidal zone contains a rich abundance of diverse organisms, despite a multitude of challenges, from pounding waves and temperature fluctuation to competition for scarce resources. Nonetheless, many organisms manage to not only survive but to...
Survivors: Predators and Prey
The ocean provides home to a dazzling variety of life. Yet there was a time when early life forms faced a multitude of struggles that threatened their ability to survive. The evolution of adaptations to overcome these challenges enabled life to endu...
Survivors: The Oxygen Revolution
At one time, Earth's atmosphere had a far smaller percentage of oxygen than it does today. Only when that percentage began to rise, thanks to the oxygen production of photosynthetic plants and organisms, was it possible for animals to come into bein...