Iguana-sized dinosaur cousin discovered in Antarctica

250 million years ago, it was covered in forests and rivers, and the temperature rarely dipped below freezing. It was also home to diverse wildlife, including early relatives of the dinosaurs. Scientists have just discovered ...

Was life on the early Earth purple?

Early life forms on Earth may have been able to generate metabolic energy from sunlight using a purple-pigmented molecule called retinal that possibly predates the evolution of chlorophyll and photosynthesis. If retinal has ...

Did plate tectonics set the stage for life on Earth?

A new study suggests that rapid cooling within the Earth's mantle through plate tectonics played a major role in the development of the first life forms, which in turn led to the oxygenation of the Earth's atmosphere. The ...

This enzyme enabled life to conquer a hostile earth

Computers are simulating the ancestral versions of the most common protein on Earth, giving scientists an unparalleled look at early life's development of harnessing energy from the Sun and production of oxygen.

Limited window to change commuting habits

Over 128 million daily commuters in the U.S. and 75% report they drive alone. From improving traffic flow to air quality, convincing people to choose a possibly "greener" mode of transportation presents many challenges. Psychology ...

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