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Dolphin ‘smiles’ may truly be a sign of playfulness

Bottlenose dolphins make an open-mouthed expression that resembles a smile ZOOMARINE, ITALY Dolphins seem to make open-mouthed facial expressions most often while they are visible to a playmate, suggesting such displays may be similar to human smiles. While we often…

Human embryo “pause button” could boost IVF success

Scientists have discovered a kind of “pause button” in early human development. This biological mechanism has long been known in other mammals, but its discovery in humans could aid IVF procedures. Some mammal species have an ability known as embryonic…