Whipsnade Zoo in the United Kingdom has welcomed seven endangered cheetah cubs, a development conservationists see as a rare piece of encouraging news. The arrivals are the zoo's first cheetah births in 15 years. What happened? Two litters were born within five days at the Bedfordshire zoo: Amira, a first-time mother, had four cubs on May 18, and her sibling Zara later delivered three, according to Talker News. View this post on Instagram A post…