They are notable for living in large family groups. Female marmosets usually give birth to twins, and the entire family is very involved in carrying and raising them, including their fathers as ...

Marmoset pregnancies generally produce fraternal twins. During gestation, the two placentas fuse, mingling the blood-producing cells of the developing fetuses. Until now, it was unclear whether ...

The common marmoset may be small enough to fit in the palm of a hand, but the diminutive stature of these monkeys belies their enormous significance in unraveling the intricate mysteries of human ...