"Woodpeckers' heads do not absorb(吸收) the force that they created when they hit the wood, Van Wassenbergh said. "Their heads are very hard like hammers(锤子)!" Experts once thought woodpeckers' skulls(头骨) worked like helmets(头盔) that could spread force out and protect their brains(...
I don't have kids. He wants to raise my taxes to pay for other parents kids education, and as Obama says, "Make College Affordable" LOL You make college affordable by giving college students money. You get that money from raising my taxes. Woodrow Wilson was a GREAT Democrat Presiden...