Sperm whale support group

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Biomarkers in human sperm have been identified that can indicate a propensity to father children with autism spectrum disorder. These biomarkers are epigenetic, meaning they involve changes to molecular factors that regulate genome activity such as gene expression independent of DNA sequence, and can be passed down to future generations. In a study published in the journal Clinical Epigenetics on Jan. Incidence of autism spectrum disorder has increased dramatically over time from 1 in 5, people in to 1 in 68 in While improved diagnosis and awareness can account for some of that change, many researchers believe the recent increase over the last two decades may be due to environmental and molecular factors. Previous studies have also shown that children can inherit the disorder from their parents, and that fathers are more often linked to autism transmission than mothers.
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An extraordinary battle between sperm whales and orcas – in pictures

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An extraordinary battle between sperm whales and orcas – in pictures | Environment | The Guardian

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The Freedivers Who Eavesdrop on Whales

Whales and dolphins are mammals that belong to the order cetacea , which also includes porpoises. The two animals are physiologically different , with whales often being larger than dolphins and more comfortable in a wider range of water temperatures. While popular culture often celebrates the intelligence of dolphins, whales and dolphins are generally thought to be equally intelligent according to recent scientific studies. Like all cetaceans , whales and dolphins are descendants of land-living animals that returned to fresh or salt water after living millions of years on land. According to fossils dating back about 50 million years, whales even share a common ancestor with the land-dwelling hippopotamus.
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Whales are a widely distributed and diverse group of fully aquatic placental marine mammals. They are an informal grouping within the infraorder Cetacea , usually excluding dolphins and porpoises. Whales, dolphins and porpoises belong to the order Cetartiodactyla , which consists of even-toed ungulates.
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