Poaceae groups, using the C3 and C4 photosynthetic pathways for carbon fixation. The C4 grasses have a photosynthetic pathway, linked to specialized Kranz leaf anatomy, which allows for increased water use efficiency, rendering them better adapted to hot, arid environments and those lacking in carbon dioxide. The C3 grasses are referred to as "cool-season" grasses, while the C4 plants are considered "warm-season" grasses. The grass family is one of the most widely distributed and abundant groups of plants on Earth. Grasses are found on every continent, including Antarctica with the presence of Antarctic hair grass on the Antarctic Peninsula. Grasses are
Experiments in the Revival of Organisms Experiments in the Revival of Organisms Experiments in the Revival of Organisms () is a 1940 motion picture which documents Soviet research into the resuscitation of clinically dead organisms. It is available from the Prelinger Archives, and it is in the public domain. The operations are credited to Doctor Sergei Brukhonenko and Boris Levinskovsky, who were demonstrating a special heart-lung apparatus called the autojektor (or autojector), also referred to as the heart-lung machine, to the Second Congress of Russian Pathologists in Moscow. It was filmed at the Institute of Experimental Physiology and Therapy, which is also in Moscow. The heart-lung