Swimming in synchrony is a fundamental social behaviour for dolphins and is thought to reinforce their bonds. Parc Astérix

Synchronised swimming makes dolphins more optimistic

A new study of captive dolphins has found that those engaging in synchronised swimming make more optimistic judgements about an unknown event.
Have we really discovered other “Earth-like” planets orbiting around other stars? Understanding what we do and do not know about exoplanets is the key to answering this question. ESO/L. Calcada/N. Risinger/Reuters

Until we get better tools, excited reports of ‘habitable planets’ need to come back down to Earth

Over the last 20 years, advances in the field of exoplanet discovery have excited the imaginations of scientists and enthusiasts alike. But we're in position to know yet whether a planet is habitable.
The red shows rat cells in the developing heart of a mouse embryo. Salk Institute

What’s the benefit in making human-animal hybrids?

Human-animal hybrids - or 'chimeras' - might sound strange, but they offer great hope for new life saving therapies, as long as key ethical boundaries are respected.

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