Hover flies vary in size and habitat, and a lot of them mimic bees and wasps – but unlike four-winged ... “We have one here ...

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U.S. Supreme Court justices expressed worries on Wednesday over the availability of online pornography to minors as they weighed the legality of a Texas law that requires pornographic websites to ...

Invasive species are non-native species that have been introduced to an ecosystem and have established there causing ecological damage. The study of invasive species involves questions about the ...

Countries are eligible to enter or leave the LDC category if they meet the defined inclusion or graduation thresholds of the criteria. The graduation thresholds are set higher than the thresholds ...