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 ...

Ancient pigment can boost energy efficiency

A color developed by Egyptians thousands of years ago has a modern-day application as well – the pigment can boost energy efficiency by cooling rooftops and walls, and could also enable solar generation of electricity via ...

Future cities could be lit by algae

The way we produce light has changed surprisingly little since Thomas Edison developed the first light bulb in 1879.

A blue stoplight to prevent runaway photosynthesis

Through photosynthesis, solar energy is converted into biological energy. It is often thought that photosynthesis becomes stronger as light becomes stronger, but actually photosynthesis may run out of control if subjected ...

Algae could be a new green power source

As world leaders prepare to gather in France for the 2015 United Nations Conference on Climate Change next week, global warming—and how to stop it—is a hot topic.

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