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Meet the Tiny Machine in Cells that Massacres Viruses

When viruses infect the body’s cells, those cells face a difficult problem. How can they destroy viruses without harming themselves? Scientists at University of Utah Health have found an answer by visualizing a tiny cellular machine that chops the viruses’ genetic material into bits. Their research shows how the machine detects the intruders and processes them for destruction to protect cells and prevent the spread of infection.

Which came first: complex life or high atmospheric oxygen?

We and all other animals wouldn’t be here today if our planet didn’t have a lot of oxygen in its atmosphere and oceans. But how crucial were high oxygen levels to the transition from simple, single-celled life forms to the complexity we see today?We and all other animals wouldn’t be here today if our planet didn’t have a lot of oxygen in its atmosphere and oceans. But how crucial were high oxygen levels to the transition from simple, single-celled life forms to the complexity we see today?

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