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A pet dog doesn’t have to be hungry to enjoy chewing on a bone. 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 FenskeSpokane, Wash. From 15,000 to 12,000 years […]
- Paleontology
Bone Crushers: Teeth reveal changing times in the Pleistocene
Tooth-fracture incidence among dire wolves in the fossil record can indicate how much bone the carnivores crunched and, therefore, something about the ecology of their time.
- Physics
Law and Disorder: Chance fluctuations can rule the nanorealm
A tug-of-war in a water droplet demonstrates that random fluctuations wield more than enough muscle to give nanoscale machines trouble.
