Will Earth survive an expanding sun? Let's take a look at the star V 391 Pegasi, 45,000 light-years away. It might reveal a possible future for our planet Earth.

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.

Over 30 years, Pepperberg taught Alex not just words, but how to count, recognize shapes and colors. Read the brainy parrot's last words.

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.

I've watched the global warming story unfold throughout my 30-year career in science journalism. For decades, scientists tried to be careful and conservative about this issue. Too careful and too conservative, I see now.

Don't count on forests to keep us cool. Learn more about how trees in the far northern forests have been growing more slowly in the summertime.

Ancient climate change made plants shift range. Read more about the research with Jonathan Bloch of the University of Florida Museum of Natural History.