Howling good time. (Letters).A pet dog doesn't have to be hungry to enjoy chewing chewing or mastication Up-and-down and side-to-side movements of the lower jaw, using the teeth to grind food for easier swallowing. During chewing, the tongue shapes food into a lump and saliva lubricates it for swallowing. on a bone ("Bone Crushers A bone crusher was a device for crushing animal bones. Bones obtained during slaughter were cleaned, boiled in water and dried for several months. After that, they were suitable for crushing with the special machine into a relatively dry gritty powder was used as fertilizer. : Teeth reveal changing times in the Pleistocene," SN: 7/27/02, p. 51). Perhaps dire wolves did enjoy a "glorious paradise" 15,000 years ago. Without other predators to chase them away from a kill, they had more leisure time to hang about and chew the bone. MATT FENSKE, SPOKANE, WASH. From 15,000 to 12,000 years ago is at least 150 dire wolf dire wolf Extinct wolf (Canis dirus) that existed during the Pleistocene Epoch (1.8 million–10,000 years ago), probably the most common mammalian species found preserved in the La Brea Tar Pits. generations. That's plenty of generations over which to have evolved stronger teeth. ALEXANDER HARCOURT, DAVIS Davis, city (1990 pop. 46,209), Yolo co., central Calif.; settled in the 1850s, inc. 1917. It is an education center with light industry; machinery, processed foods, and computer equipment are produced. The extensive Univ. , CALIF. SEND COMMUNICATIONS TO: Editor, Science News 1719 N Street, N.W., Washington, D.C. 20036 or scinews@sciserv.org All letters subject to editing |
|
||||||||||||||
Printer friendly
Cite/link
Email
Feedback
Reader Opinion