Ice skating. Ice skating is the act of moving on ice by using ice skates. It can be done for a variety of reasons, including exercise, leisure, traveling and various sports.
Darwin's evidence for evolution. In his Origin, Darwin presents his evidence supporting descent with modification (branching evolution) in several chapters: A. In Chapters 1 and 2, he considers how patterns of variation in domesticated and wild fauna and flora support descent with modification. B. In Chapters 10-12, he shows how the patterns of species distributions in time and space support branching evolution from common ancestral lineages.
1 The occurrence of organic evolution is established by the innumerable evidences that are available from the different branches of biology.  The study of extinct organisms (palaeontology) provides direct evidences in favour of evolution.