Baby penguin! There are few certainties in life, but alongside death, taxes, and the arrival of hot weather in July, at least one other thing is inarguable: baby penguins are almost impossibly cute. Guests visiting the Tennessee Aquarium during the Fourth of July holiday can join Aquarium staffers in excitedly welcoming the newest addition to the Penguins’ Rock gallery — a fluffy (and shockingly fast-growing) Macaroni Penguin chick. The chick hatched on June 2 from an egg laid in late April by parents Bacon and Merlin. This baby bird is the first offspring ever produced by Bacon, who hatched in 2015 to two other Aquarium penguins, Hercules and Little Debbie. Though Little Debbie now lives at another facility, the newest chick’s grandsire, Hercules, still calls Penguins’ Rock home. With this latest arrival, the Aquarium is home for the first time ever to three generations of Macaroni Penguins. The new chick is the Aquarium’s first hatchling since the 2021 arrival of Carla, a Gentoo Penguin. This latest baby is the first Macaroni Penguin chick since Pedro hatched in 2019. The Aquarium’s colony now has 23 birds: 9 Macaronis and 14 Gentoos. The Aquarium’s keen-eyed penguin care team first noticed the egg pipping — that’s the cracking that occurs when a baby bird begins to chip away at its shell from the inside — on a Friday afternoon when they spotted a dime-sized hole with a tiny beak moving around inside. The new chick seemed to get cold feet on Saturday with little progress. However, by Sunday morning, the chick had fully emerged with an unusual level of precision that surprised even its…