May marked the 40th anniversary of the eruption of Mt. St. Helens in Oregon — the deadliest eruption in US history. The resulting crater measures a mile across by about two miles across.
Scientists are mimicking the high pressure conditions in planetary cores in a lba at the Carnegie Institute for Science. This scanning electron microscope image shows a “planetary core” of iron — the bright circle.
Stephen Elardo
This cool antarctic landscape posted by geophysicist Laura Mony shows the interaction between ice and ash from past eruptions.
Four percent of this mouse’s cells are human. In a lab, scientists developed mouse embryos with some human cells to create better models with which to study things like infectious disease.
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