February 25th
1682 - Birth of Giovanni Battista Morgagni, Italian anatomist
1919 - Birth of Karl H. Pribram, Austrian neuroscientist
1950 - Death of George Minot, American physician, recipient of the Nobel Prize in Physiology or Medicine
1953 - Death of Sergei Winogradsky, Russian scientist
1971 - Death of Theodor Svedberg, Swedish chemist, Nobel Prize laureate
1999 - Death of Glenn T. Seaborg, American chemist, Nobel Prize laureate
2006 - The world's estimated population reaches 6.5 billion.