Tornadoes, nature's most violent and unpredictable storms, descend from the clouds nearly one thousand times yearly and have claimed eighteen thousand American

In this era of high-tech instruments, meteor observing is the one facet of astr- omy that needs nothing more than your naked eye. Meteors can be easily seen wit

“This is Pern, in the hands of a new master-grade harper. . . . May the saga continue!” —David Weber, New York Times bestselling author of The Shadow of S

The naval aviation safety review.

Reports NIST research and development in the physical and engineering sciences in which the Institute is active. These include physics, chemistry, engineering,