What is the pinard gland?

How are riverbeds formed? Who was the first person to go to a black hole? What are the 3 types of blood? What does the universe is unfolding as it should mean? Is all light energy solar system? What is the most reactive element in group 1A? What is the topic in the song Black hole sun by Soundgarden? Is ovaries retro peritoneal or peritoneal structure? What is the color of the interior plains? Is nitrogen gas at high temperature and pressure flammable is there is no temperature and pressure at which nitrogen gas can be flammable? What planets orbit the sun from least orbit time to greater orbit time? Why have geologist created the geologic time scale? How do volcanoes form tsunamis? Which slot of an outlet is hot? What was Apollo's beautiful snow covered mountain called? How is cars different from a living thing? What symbol on a map shows national capital? Why was the last paragraph of the Watson and crick paper the most important? Why does transmission light increase as the glucose concentration increase? When an atom gains an electron is it an isotope?