May 2013 Page ii. EXECUTIVE SUMMARY. Dentistry in the United States is in a period of transformation. The population is aging and. becoming more diverse. The health care delivery system is changing rapidly with the. implementation of the Affordable Care Act. Consumer habits are shifting with Americans.
To get places faster if there legs are tired Penguins slide on their bellies because they have short, thick and dense feet. That makes it hard to walk. According to the inform â¦ ation I have read about, penguins love sliding on their bellies because it's easier to them.
Penguins carry this air jacket with them when they dive into the water. The researchers carefully studied BBC footage of penguins diving and rising, estimating they rise on average 2.8 times the descending speed. 2 The buoyancy of their air jacket when they swim downward requires more energy than swimming upward.