Newly identified molecule could help regulate sleep

Sleep is known to be essential for survival, as it allows both humans and other animals to rest, while the brain consolidates memories and clears out metabolic waste products. For many people worldwide, however, falling asleep ...

Viagra may reduce cancer metastasis, study shows

Viagra was originally developed to treat high blood pressure and chest pain caused by reduced blood flow to the heart, but over the past three decades it has become the world's best-known therapy for erectile dysfunction. ...

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