Why is the ocean blue? People have wondered this for hundreds of years. One idea is that it reflects the sky.

From the coast, it may appear a deep blue on a sunny day. Or gray … Explore how the ocean shapes life on earth. It sustains us, surprises us, and holds mysteries we're only beginning to understand. Dive into key topics here. A trip to the ocean means sun, wind, and waves. Surfers ride them.

Dive into key topics here. A trip to the ocean means sun, wind, and waves. Surfers ride them. Children play in them. Swimmers dive beneath them. But what causes waves? Discover the ocean learning hubâ€your gateway to trusted ocean science content. Easily explore by topic, media type, grade level, and educational standards. Without the ocean, life as we know it wouldn't be possible. There are a number of key reasons why. First, the ocean is the largest source of oxygen on earth. According to scientists, approximately half …

But what causes waves? Discover the ocean learning hubâ€your gateway to trusted ocean science content. Easily explore by topic, media type, grade level, and educational standards. Without the ocean, life as we know it wouldn't be possible. There are a number of key reasons why. First, the ocean is the largest source of oxygen on earth. According to scientists, approximately half …

There are a number of key reasons why. First, the ocean is the largest source of oxygen on earth. According to scientists, approximately half …