Fluorescent proteins move from the ocean to the lab. Read more in "Glow in the Light".

Scientists believe that Earth's water was brought here early in Earth's history. They think icy comets and asteroids bombarded the young Earth for hundreds of millions of years. According to astronomer Bob Kandel the impacts heated the ices, causing them to evaporate. Eventually there was so much water vapor in the atmosphere it would have rained out onto Earth's surface.

How does the media portray the deep sea, and how does this coincide with what scientists discover about it? Read more about perceptions of the deep sea.

The "faint sun paradox" has to do with the relationship between the sun's size and Earth's climate.

Is our universe shaped like a sphere, a saddle, or flat? It depends on how you look at it. That will tell us if the universe is open or closed. Read more here.

A recent study suggests that, by the 2080s, extreme summer warming in cities such as Chicago and Atlanta could hover above 100 degrees Fahrenheit. Read more.

He has created a device that could help doctors identify what are called "oncoproteins." This research might eventually enable doctors to better diagnose and treat early-stage cancer.

Scientists want to know if habitable planets are common. And if they are, how close are some to us? Learn about Gliese 581, one of the 100 closest stars to us.

The largest spiral galaxy known to astronomers is Malin 1. Its disk of stars measures 650,000 light-years across, several times the diameter of the disk of our Milky Way galaxy. In 2007, a newly found image from the Hubble Space Telescope revealed that the central part of Malin 1 looks like an ordinary barred spiral galaxy, somewhat like our Milky Way.

Early stargazers named Neptune for the god of the sea. Now the possibility exists for Neptune to have an ocean of its own ... someday. Astronomers say our sun will become a faint white dwarf star some 8 billion years from now. Then Neptune will cool, possibly causing rain to fall from Neptune's clouds - which might create a water layer, or ocean, up in Neptune's thick atmosphere.