Cud Cud Cud is a portion of food that returns from a ruminant's stomach to the mouth to be chewed for the second time. More accurately, it is a bolus of semi-degraded food regurgitated from the reticulorumen of a ruminant. Cud is produced during the physical digestive process of rumination. The idiomatic expression "chewing one's cud" means "meditating" or "pondering"; similar expressions such as "he chewed that over for a bit", or "chew on that!" likely have the same derivation. The alimentary canal of ruminants, such as cattle, goats, sheep, alpacas, and antelope, are unable to produce the enzymes required to
Da Vinci Science Center two dozen hands-on activities that allow visitors to interact with various scientific fields, ranging from seismology to nano technology to animation. All of the exhibits aim to help children view science as playful and interesting. Inspired by a children's book series, this exhibit explores all the qualities of animals that people tend to find disgusting. Visitors who walk through this exhibit learn about the various means of childbirth throughout the animal kingdom and the variety of nutrient sources different species rely on, from cows chewing cud to mosquitoes sucking blood. There's also a section devoted to showing what happens to