With an understanding of individual organisms, let's take a look at population ecology, which looks at the dynamics of populations of organisms. How do populations grow? How are they structured? What is their geography? There is a lot to...

The California condor is the biggest flying bird in North America, a title that it has held since the Late Pleistocene Epoch. It's just one example of an organism that we share the planet with today that seems lost in time, out of place...

We hike in the Australian Outback with Abigail Allwood to visit the most ancient fossils on Earth, and track the imprint of life over space and time with David Grinspoon.

Only in the last 570 million years have life forms that we are familiar with started to evolve. Much of what we know about evolution comes from the fossil record. The first mammals started appearing about 220 million years ago, and only...

Planet Earth was created under the force of gravity, when stellar dust and rocky debris from the solar nebula combined. “Proto-Earth” was completely molten, its atmosphere toxic. A collision with planetoid Theia formed the Moon. Earth...

Happy New Year, planet Earth! According to the Anno Domini designation, the year is now 2014. But the Earth has been around a lot longer than that - about 4.567 billion years. The first evidence of life dates back to around 3.8 billion...