Archaeopteryx following Thomas Henry Huxley's lead in 1868, argued that birds evolved within theropod dinosaurs and "Archaeopteryx" was a critical piece of evidence for this argument; it had several avian features, such as a wishbone, flight feathers, wings, and a partially reversed first toe along with dinosaur and theropod features. For instance, it has a long ascending process of the ankle bone, interdental plates, an obturator process of the ischium, and long chevrons in the tail. In particular, Ostrom found that "Archaeopteryx" was remarkably similar to the theropod family Dromaeosauridae. Specimens of "Archaeopteryx" were most notable for their well-developed flight feathers.
Ancestor yet the number 2, approximately 10 or one trillion, dwarfs the number of humans who have ever lived. Some cultures confer reverence to ancestors, both living and dead; in contrast, some more youth-oriented cultural contexts display less veneration of elders. In other cultural contexts, some people seek providence from their deceased ancestors; this practice is sometimes known as "ancestor worship" or, more accurately, "ancestor veneration". Ancestor An ancestor is a parent or (recursively) the parent of an antecedent (i.e., a grandparent, great-grandparent, great-great-grandparent, and so forth). "Ancestor" is "any person from whom one is descended. In law the person from