Get the Popular Science daily newsletter💡 Breakthroughs, discoveries, and DIY tips sent six days a week. It turns out that giant otter (Pteronura brasiliensis) newborns are actually quite small, weighing just around 7.1 ounces. “[That’s] about the same as a decent-sized chocolate bar,” Frazer Walsh, a carnivore keeper at Chester Zoo outside of Liverpool, England, tells Popular Science.  The zoo has just welcomed three of their own decent-sized chocolate bars, the offspring of mother Bonita and father Manu. The three siblings haven’t received names yet. Before the birth, the zoo’s staff cordoned off the giant otter habitat before their birth, and kept a non-invasive eye on the soon-to-be family using cameras. In fact, it was through these cameras that they discovered that the litter had arrived, but they continued giving the family privacy throughout the pups’ time as newborns.  Parents Bonita and Manu welcomed their new litter in relative privacy. Image: Chester Zoo “We like to make sure it’s as natural as possible. That means the parents are allowed to carry on their natural behaviours …