Childbirth may be tougher for some tiny monkeys than it is for humans
· earth.com · popularity 21/100 · 0 similar stories today

Read the original at earth.com →
Summary
Textbooks say human birth is uniquely hard because of our big heads. A new primate comparison found squirrel monkeys, bushbabies and others face an even tighter fit.
Found in: Earth.com. Rating basis: single outlet; outlet tier 2 (unlisted); 1 feeds; feed position 1.