Nature & Life Cycles

Pet, tree and planetary age comparisons using transparent educational models.

Dog age expressed as an approximate human-age equivalent.

Cat age expressed as an approximate human-age equivalent.

An estimated tree age from trunk circumference and growth factor.

An earth age converted to approximate ages on other planets.

Horse age expressed as a simple human-age comparison.

Rabbit age expressed as a simple human-age comparison.

Bird age expressed as a broad educational human-age comparison.

Turtle age represented using a simplified life-stage comparison.