Leptin is a cell-signalling hormone vital in the regulation of appetite, food intake and body weight. Studies have shown that an absence of leptin in the body or leptin resistance can lead to uncontrolled feeding and weight gain. Mechanisms and actions of leptin Leptin acts as a hormone that modulates the size of the adipose tissues in the body.
The Rosetta Stone The Rosetta Stone What is the Rosetta Stone? The Rosetta Stone is a stone with writing on it in two languages (Egyptian and Greek), using three scripts (hieroglyphic, demotic and Greek).
In the 19th century, the Rosetta Stone helped scholars at long last crack the code of hieroglyphics, the ancient Egyptian writing system. French army engineers who were part of Napoleon Bonaparteâs Egypt campaign discovered the stone slab in 1799 while making repairs to a fort near the town of Rashid (Rosetta).