For decades, many scientists have relied on the "hard steps" model to suggest that intelligent life is rare — the improbable ...

Additional disaster exposures were associated with greater declines in mental health and shifts in some risk factors.

They reveal a whole new level of detail in these planet-forming systems. Breakthroughs, discoveries, and DIY tips sent every ...

The solar system consists of our star, the sun, and everything bound to it by gravity: the planets Mercury, Venus, Earth, ...

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UNEP Executive Director Inger Andersen calls for continued progress towards establishing the science-policy panel on chemicals, waste and pollution prevention, emphasizing its role to provide ...