Korean band BTS appears at the daily press briefing with Press Secretary Karine Jean-Pierre, in the Brady Press Briefing of the White House in Washington, DC, May 31, 2022.
SAUL LOEB/AFP via Getty Images
This photomicrograph depicts Leishmania donovani parasites contained within a canine bone marrow cell. One of the more dangerous of 20 different species of Leishmania, L. donovani is endemic to parts of India, Africa, and South-West Asia.
Dr. Francis W. Chandler/CDC
A female adult head louse holds onto human hairs, as it is filmed under a microscope. The brown line visible inside the louse, on the left side of its body, is the blood meal it took when it lived on a human host's scalp.
These mitochondria, in red, are from the heart muscle cell of a rat. Mitochondria have been described as "the powerhouses of the cell" because they generate most of a cell's supply of chemical energy. But at least one type of complex cell doesn't need 'em, it turns out.