* Green: These articles are about life science topics.
* Red: These articles are about physical science topics.
* Blue: These articles are about earth and space science topics.
* Yellow: These articles are about technology and engineering topics.
* Black: These articles are about science in the news.
* Life Science: Article about a new species of plant discovered in the Amazon rainforest.
* Physical Science: Article about a new theory about the formation of the universe.
* Earth and Space Science: Article about a recent earthquake in California.
* Technology and Engineering: Article about a new type of solar panel that is more efficient than traditional solar panels.
* Science in the News: Article about the debate over climate change.