Nightly News | June 14, 2013
>>> we're saying so long to a beloved colleague tonight. robert bazell , chief science correspondent for almost four decades. he is beginning a new chapter in his career. in his 38 years with nbc news, robert bazell on the front lines and on the forefront of science and health reporting.
>> others get an infection.
>> reporter: in the early 1980s , the first journalist to report on a new illness, even before it was called aids.
>> reporter: the scientist say this probably means they are dealing with a new deadly sexuly trancemismitted disease.
>> he chronicled the start of the shuttle program and helped guide us through the challenging day when the "challenger" exploded in 198 6. and talked about bird flew and whether it would spread worldwi worldwide.
>> research solves a great mystery in biology.
>> reporter: in iraq, he brought home the heavy toll of the conflict.
>> soldiers and marines rushed in.
>> reporter: and documented the suffering after the earthquake in haiti. helping us understand the world took him to some of the most fascinating places on earth.
>> reporter: the steam vents throughout the country are caused because water seeps into the earth and hit molten rock right beneath the surface.
>> reporter: he set a standard for science journalism . and bob has been much more than a colleague to many of us here at nbc news. a friend and never hesitated to lend a hand when health became personal. later this summer, bob will join the faculty of yale university . in the department of molecular, cellular and developmental biolo biology. we wish bob and his family all