ocean

Scientists have discovered evidence of another ancient asteroid impact, but not the one that killed the dinosaurs. This asteroid is much, much older than that.

The deep ocean is a confusing place to navigate. There are almost no visual landmarks, and water currents can carry an animal off course. Yet many species of sharks reliably find their way over long distances in the open ocean.

The world's oceans are like a sponge for heat, absorbing about 90 percent of the excess warming caused by carbon emissions from human activities. That would mean that measuring changes in the temperature of the oceans is an independent and critical measure of climate change.

There are around sixty-four species of flying fish, and they really do fly.

Sea urchins are small, furry, and sometimes colorful. They usually don't bite humans, but they do have really sharp teeth that researchers learned sharpen themselves.