Did you know that chickens and the big T-Rex dinosaurs are kind of like distant family? A long, long time ago, dinosaurs like the T-Rex roamed the Earth. Even though they seem very different, chickens are actually modern birds that come from creatures related to those dinosaurs!
So, you can think of chickens as the tiny great-great-great-grandchildren of T-Rex dinosaurs. They share some special features, like similar bones inside their bodies!
It's like how you have cousins and grandparents in your family; chickens and T-Rex are part of the same big animal family tree, just from a very long time ago.