genetic factors

Ancient DNA reveals genetic roots of multiple sclerosis and other diseases

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Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news about fascinating discoveries, scientific developments and more. Scientists have compiled the largest database of ancient DNA, based on the bones and teeth of nearly 5,000 people who lived across Western Europe and parts of Central Asia from 34,000 years ago to the … Read more

New study helps explain the ‘Darwinian paradox’ of same-sex attraction

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Men with genetic factors linked to bisexual attraction tend to have more children, a new study shows. The paper published Wednesday in Science Advances found evidence for genetic variations that contribute to both bisexual attraction in men and increased risk taking. These findings help resolve a paradox at the heart of evolutionary theory – while … Read more