It bonds with its silicon neighbor atoms, but one electron is not involved in bonding. Instead, it is free to move inside the silicon structure. A solar cell consists of a layer of p-type silicon ...

2 The collection of epigenetic marks in a cell or organism is known as its epigenome. “Epigenetics is the layer of control that sits on top of the DNA sequence itself, and it's what dictates if genes ...

allowing a fetus to gather enough oxygen from its mother's bloodstream. The adult version normally takes over after birth, once oxygen can be obtained through breathing. However, in sickle cell ...