Only 70 percent of the world’s snakes lay eggs. The rest give birth to live young. Oviparous—or egg-laying—snakes tend to live in warmer climates, which helps incubate their eggs. Viviparous—or live-birthing—snakes tend to live in cooler regions, where the ground is too cold for the eggs to develop on their own.
The United States Army Special Forces, colloquially known as the Green Berets due to their distinctive service headgear, are a special operations force tasked with five primary missions: unconventional warfare (the original and most important mission of Special Forces), foreign internal defense, special reconnaissance, direct action, and counter-terrorism.