Caged molecules do their thing. 1  Twelve or more table tennis balls. 2  One different-colored table tennis ball. 3  Wire basket. 4  Cardboard cut to fit over the basket opening. 5  Tape. 6  A hair dryer (set to the coolest setting), fan, or other blower.
Photo credit: Danika Bannasch, UC Davis. Hereditary equine regional dermal asthenia (HERDA) is a genetic skin disease found in the Quarter Horse. The disease is characterized by hyperextensible, elastic skin, severe dermatologic lesions, and often scarring along the back and withers of affected horses.
Wildebeest at the Ngorongoro Crater; an example of a herd in the wild. A herd is a social grouping of certain animals of the same species, either wild or domestic. The form of collective animal behavior associated with this is referred to as herding. The term herd is generally applied to mammals, and most particularly to the grazing ungulates that classically display this behaviour.