Researchers theorized the presence of an interior reservoir of water in 2005 when Cassini discovered water vapor and ice spewing from vents near the moon's south pole. The new data provide the first geophysical measurements of the internal structure of Enceladus, consistent with the existence of a hidden ocean inside the moon.
Apoptosis is the process of programmed cell death. Unlike necrosis, the premature death of cells, apoptosis is essential to life. For example, in embryogenesis, apoptosis occurs as the developing embryo pares away unneeded or unwanted cells and tissues. It’s part of the process that results in the separation and definition of the fingers. Apoptosis is one way the body fends off invasive cancers.
This Esquel meteorite was found in Chubut, Argentina in 1951 by a rancher digging a cattle pond. A single mass weighing more than 700 kilograms was found. Despite more than 50 years of searching, no more pieces of this rare pallasite have been recovered.