Cistus, with its many hybrids and cultivars, is commonly encountered as a garden flower. The common name rockrose is applied to the species, a name also shared by the related genera Halimium, Helianthemum and Tuberaria, all in the family Cistaceae. The common name gum cistus is applied to resin-bearing species, especially C. ladanifer.
Quasars are part of a class of objects known as active galactic nuclei (AGN). Other classes include Seyfert galaxies and blazars. All three require supermassive black holes to power them.
Salamanders are a family of amphibians that look like lizards but are actually completely unrelated to them. They can be distinguished from lizards by their smooth, wet skin and tendency to live in the water. Salamanders are most famous for their ability to regrow limbs that they have lost, including their tails, legs and arms, in just a few days!