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Risky play exercises an ancestral need to push limits

Since their invention in the 1920s, jungle gyms and monkey bars have become both fixtures of playgrounds and symbols of childhood injury that anxious caretakers want removed. Anthropologists mark 100 years of the iconic playground equipment by arguing that risky play exercises a biological need passed on from apes and...

Surprising hormone-related gene activity discovered in the early larval stage of the Malabar grouper

Researchers have highlighted patterns of gene activation during Malabar grouper larval development, revealing an unusual early peak of activation of thyroid and corticoid genes during the early larval stage of these fish. Their paper shows that thyroid and corticoid genes are activated twice during larval development, once during the early...