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
Prohibition against slaughtering an animal and its offspring on the same day Prohibition against slaughtering an animal and its offspring on the same day The prohibition against slaughtering an animal and its offspring on the same day is a negative commandment in Judaism which forbids the slaughter of a kosher four-legged animal and its offspring on the same day. The commandment originates from a verse in the book of Leviticus that states: The commandment is preceded by the instruction that a calf or lamb is only acceptable for sacrifice on the eighth day (22:26). The Hebrew Bible uses the generic word for bull or cow (Hebrew: שור "showr"), and the generic word