IMAGE 1900_99\967.Lbm,Trees lie felled like ninepins near the Tunguska River in Siberia, following a devastating event that happened in 1908. It could have been caused by the explosion of a small asteroid or the nucleus of a comet in the atmosphere.
IMAGE 1900_99\969.Lbm,Three short asteroid trails show in this long-exposure photograph taken by a camera driven to follow the stars.