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Does the number of siblings you have harm your mental health? If you have a large family, then yes

Does the number of siblings you have harm your mental health? If you have a large family, then yes
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Daily voice workouts help songbirds find a mate, study finds

Male songbirds sing daily to build muscle

Daily vocal practice by songbirds has been shown to help keep them fit and attractive for potential mates according to a new study.

Daily singing workout keeps songbird males at

<p>It has long been a mystery why songbirds spend so much time and energy on singing. Now a new study shows that songbirds need to sing every day to keep their vocal muscles in shape. Females can hear if a male has skipped his singing workout for only a few days, and they prefer song of males that did their daily vocal gymnastics.</p>

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