Why does the Beast look like a cat?
from www.uncannyxmen.net After mourning [for Colossus], Beast too left Xaviers school and met with Storms team to begin their quest with a visit to Valencia, Spain. They came into conflict with the country’s own Guardia Civil and also a mysterious man known as Vargas, who killed Psylocke and seriously wounded Beast. Hank was only saved when Sage jumpstarted his latent healing abilities, which also foreshadowed a further mutation. Beasts injuries forced him to return to the mansion, as Storm considered him a security risk for the rest of her team. Not long after returning to Westchester, Beast experienced a regressive mutation that transformed him from ape-like to cat-like. His new body was much larger and possessed greater senses and predatory instincts. He needed some time to adjust to his altered state but, at the same time, began working with the new students at the Xavier Institute to help them fulfill their potential.
