NEW YORK (UPI) - Tiny mobile robots zipping through the wilderness on cables could monitor endangered species discreetly and analyze environmental chemistry linked to global climate. The robot networks, strung on their steel webs, also could screen urban streams for pollutants and germs and probe bridges for cracks. The little machines could even help archaeologists explore ancient sites while minimizing damage to precious artifacts, and any data they collected could be beamed, wirelessly and instantaneously, to public Web sites for researchers and students to analyze. "We would like, in particular, to enable students in grades 6 to 8 to participate,"...