Feb 23, 1941
Dr. Glenn T. Seaborg discovered the chemical element Plutonium（钚）.
Plutonium is used as both a fuel and an explosive.
Without plutonium, the atomic bomb would not have been possibly made.
Feb 23, 1821
John Keats（济慈）, English romantic poet, died at age 25.
His last request was to be placed under a tombstone bearing no name or date, only the words, "Here lies One whose Name was writ in Water."
Keats was buried in Rome.
His tombstone reads as follows:
This Grave
contains all that was Mortal
of a
YOUNG ENGLISH POET
Who
on his Death Bed
in the Bitterness of his Heart
at the Malicious Power of his Enemies
Desired
these Words to be engraven on his Tomb Stone
Here lies One
Whose Name was writ in Water
Feb 24th 1821