The life forms on our planet have been changing over time for more than three and a half billion years.
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Courtesy of NASA
Welcome to the Evidence of Evolution Exploratour!
This Windows to the Universe Exploratour examines the scientific evidence of biological evolution. It is available at the intermediate and advanced levels only. To travel through the tour, click the back button and choose the intermediate level at the top of your screen. To choose a different tour, click the blue button called "Go on another tour"!
Shop Windows to the Universe Science Store!
Our online store
includes fun classroom activities
for you and your students. Issues of NESTA's quarterly journal, The Earth Scientist
are also full of classroom activities on different topics in Earth and space science!