The human species may be more than 100,000 years old but the bulk of its numerical growth has come in just the last few decades: 2.6 billion of today's 5.6 billion people have been born since 1960.
The human species is definitely less than 100,000 years old.
( z1 less-than :op ( z2 temporal-quantity :quant 100000 :unit ( z3 year ) :age-of ( z4 species :mod ( z5 human ) ) ) :mod ( z6 definite ) )