Cumulonimbus Clouds Cumulonimbus clouds are much larger and more vertically developed than cumulus clouds which form in a more stable atmosphere. They can exist as individual towers or form a line of towers called a squall line often present at cold fronts.
Sam Sheppard was an American physician best known as a homicide suspect in his wifeâs murder.
Sam Shepard: 'America is on its way out as a culture'. 1  As his seminal 1980 play, True West, is revived in London, the influential playwright reflects on the diminishing global role of the US, and the deaths of his friends Philip Seymour Hoffman and Robin Williams.