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Rat's age in months Rat's age in years Rat's age in human years ' K: Z$ p/ D; O) ]5 \+ Z1.5 months (puberty) 0.125 years 12.5 years (puberty) % X {, r2 @+ f2 Q2 C# h1 o6 months (social maturity) 0.5 years 18 years (social maturity) : i" D" H* C+ \- M# L' j# O! d12 months 1 year 30 years 8 ~) L6 a% m- \) ]3 x
18 months 1.5 years 45 years . d' t+ a- f4 T' i* ]
24 months 2 years 60 years ( \0 B4 Z0 E. O
30 months 2.5 years 75 years 6 L5 r4 M8 |$ |1 x0 J# }5 j36 months 3 years 90 years $ O* {9 w: N& ^! ?! ]) t6 w) n