Zebrafish their larval stages. In 2011, the British Heart Foundation ran an advertising campaign publicising its intention to study the applicability of this ability to humans, stating that it aimed to raise £50 million in research funding. Zebrafish have also been found to regenerate photoreceptor cells and retinal neurons following injury, which has been shown to be mediated by the dedifferentiation and proliferation of Müller glia. Researchers frequently amputate the dorsal and ventral tail fins and analyze their regrowth to test for mutations. It has been found that histone demethylation occurs at the site of the amputation, switching the zebrafish's cells
Black-legged seriema foxes. Seriemas are very fierce, and they have been known to attack humans, especially when defending their young. Black-legged seriema The black-legged seriema ("Chunga burmeisteri") is one of two living species of seriemas in the family Cariamidae. It is found in Argentina, Bolivia, and Paraguay. Its natural habitats are subtropical or tropical dry forests and subtropical or tropical dry shrubland. The black-legged seriema is similar to its relative, the red-legged seriema, "Cariama cristata". However, the black-legged seriema is more arboreal than its cousin, and it prefers to spend more time in trees. They often live together in family groups, and