Numerous cells inside the brains of marmosets truly come from their siblings, doubtlessly influencing their behaviour – and the identical could also be true of human fraternal twins.
We already know that marmosets, small monkeys native to South America, carry their siblings’ cells of their blood. It’s because, not like different primates, most marmosets have non-identical twins or triplets, which trade blood cells whereas within the uterus by way of a shared circulatory system. These swapped cells are retained after delivery, which means that up…