The earliest lifeforms, cyanobacteria, appeared around 4 billion years ago. These organisms, now known as algae, were among the first to engage in oxygenic photosynthesis.

Kandi Gorko had just woken up Wednesday when she received the phone call every parent dreads — her teenage son had been ...

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That, in turn, meant that those particles absorbed blue and red light, when meant that more green light was able to pass through and the oceans appeared green. As a result, the team of experts led by ...