Viewer weather pics
The heat is on! Find out which states are getting warmer the fastest.
The heat is on! Find out which states have warmed the most since 1970, according to the average temperature change per decade as measured by the environmental group Climate Central.
Library of Congress
Vasco da Gama arrives in India, Christopher Columbus dies, Norman Rockwell makes his Saturday Evening Post cover debut, HIV is discovered, and "Cheers" airs its series finale, all on this day.