Month: July 2021

U.S. Surgeon General Dr. Vivek Murthy told CNBC on Wednesday there is reason to be hopeful that people who received the single-shot Johnson & Johnson Covid-19 vaccine may be protected against the virus’ delta variant. Murthy pointed to data that showed the Oxford-AstraZeneca shot is highly effective against hospitalization from the more contagious variant. He
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By Allison Kubo Hutchison USGS: Pyroclastic flow at Mount Saint Helens on August 7, 1980. The volcano erupts. The immense pressure within the volcano due to the build-up of gases causes fragmentation. The thicker and more viscous the magma the more fragmentation occurs (Read more about that here). The fragmented magma cools into sharp, glasslike
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