Olive tree disease in Italy alarms EU

Brussels called for "complete vigilance" Monday to stop the spread of a strain of bacteria killing olive trees in southern Italy, the European Union's second biggest producer of olive oil.

Archaeologists discover Maya 'melting pot'

Archaeologists working in Guatemala have unearthed new information about the Maya civilization's transition from a mobile, hunter-gatherer lifestyle to a sedentary way of life.

Quantum correlation can imply causation (Update)

Does taking a drug and then getting better mean that the drug made you better? Did that tax cut really stimulate the economy or did it recover on its own? The problem of answering such questions - of inferring causal relationships ...

Wandering Jupiter accounts for our unusual solar system

Long before Mercury, Venus, Earth, and Mars formed, it seems that the inner solar system may have harbored a number of super-Earths—planets larger than Earth but smaller than Neptune. If so, those planets are long gone—broken ...

Non-native plants are 'not a threat' to floral diversity

Non-native plants are commonly listed as invasive species, presuming that they cause harm to the environment at both global and regional scales. New research by scientists at the University of York has shown that non-native ...

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