Although the magnificent ivory of elephant tusks seems very smooth to the naked eye, it is actually quite porous when viewed under a microscope. These microscopic pores are very good at soaking up fingerprints, thereby […]
Environmental Protection
EPA Imposes New Restrictions On Ground-Level Ozone
New limits on smog emissions were released on Thursday by the Environmental Protection Agency (EPA), in a move to decrease suffering due to asthma and respiratory illness. The EPA has dropped the limit on ozone […]