earth1d
"Purple Earth" hypothesis is gaining scientific momentum
Purple Earth Hypothesis suggests Earth was once a purple planet. Early microbes used retinal, not chlorophyll, for ...
Earth’s Oceans Were Green a Billion Years Ago. They Could Soon Be Green Again.
Although the Earth’s been decidedly blue for 600 million years, rising populations of phytoplankton caused by rising ...
New Study Says Earth Once Had Green Oceans
A new study published by an international team of researchers led by Taro Matsuo, an astrophysicist at Nagoya University in Japan, argues that this evolutionary trend made sense 3 billion years when ...
New Scientist4d
Earth’s oceans may have been green for billions of years
Some cyanobacteria have pigments that specialise in harvesting green light to power photosynthesis, which may be because they ...
Oceans on Earth may have all been green for eons before they turned blue
Earth's oceans may have been green for billions of years until the first photosynthetic organisms flooded our atmosphere with ...
A New Study Suggests Aliens Aren’t Little Green Men. They’re Purple People Eaters.
The search for life beyond Earth requires expanding the very definition of what life can be. Some exoplanets, especially ...