17.6.2 The collapsing border model. In the collapsing border model, it is possible to specify borders that surround all or part of a cell, row, row group, column, and column group. Borders for HTML's rules attribute can be specified this way.
Cancel. Giraffes can live up to 26 years old in the wild, but they can live much longer in captivity where disease and predators are absent. Discover a giraffe's life cycle with information from an animal behavior specialist in this free video on zoo animals. Part of the Video Series: Zoo Animals.
Giraffes reach sexual maturity in captivity at 3-4 years of age. However, in the wild, males may not breed until ages 6 or 7, due to a system of hierarchy among bulls. In contrast to the male breeding age, females must be physically larger to carry offspring. Breeding season can occur at any time.