Table 1.

Life history and phenotype variables among study taxa

Species name	Order	Gestation, days	Age of sexual maturity, months	Life span, yr	Litter size	Brain weight, g	Body weight, g	EQ
Homo sapiens	Primates	270	198	75	1	1300	44,000	8.7
Mus musculus	Rodentia	19–21	1.5	2	3–12	0.43	21	0.5
Loxodonta africana	Proboscidea	660	330–660	50–70	1	4420	3,505,000	1.6
Echinops telfairi	Afrosoricida	42–49	8	13	1–10	0.62	88	0.3
Bos taurus	Cetartiodactyla	277–290	18	20	1	473.5	489,900	0.6
Canis familiaris	Carnivora	63	10–24	12	3–10	81.14	12,470	1.3

Expanded Table 1 with references can be found in Table S1.