Category:1991 in science

A

• 1991 archaeological discoveries (1 C, 7 P)

B

• 1991 in biology (2 C, 2 P)

E

• 1991 earthquakes (12 P)

M

• 1991 meteorology (3 C, 9 P)
• Minerals described in 1991 (1 P)

O

• Scientific organizations established in 1991 (2 C, 8 P)
• 1991 in outer space (3 C)

P

• 1991 in paleontology (1 C, 5 P)

R

• 1991 in robotics (1 C)

• 1991 in science

A

• 1991 in archaeology

K

• 1991 Kalabahi earthquakes

L

• List of fellows of the Royal Society elected in 1991
• January 1991 lunar eclipse
• June 1991 lunar eclipse
• July 1991 lunar eclipse
• December 1991 lunar eclipse

O

• Oh-My-God particle
• Ötzi

P

• 1991 in paleontology

S

• Solar eclipse of January 15, 1991
• Solar eclipse of July 11, 1991

T

• The Thriving Cult of Greed and Power

U

• Upsweep

V

• V838 Herculis