Event:
Scientists uncover a 2.8-million-year-old jawbone of a primitive human; the find suggests that humans may have evolved from hominins, or humanlike primates, about 400,000 years earlier than previously thought
More Notable Events on March 4:
1997 President Clinton bans federally funded human cloning research
1985 Virtual ban on leaded gas ordered by EPA
1979 U.S. Voyager I photo reveals Jupiter's rings
1837 City of Chicago incorporates
1801 Thomas Jefferson is the 1st president inaugurated in Washington D.C.
