CRISPRed fruit flies mimic monarch butterfly, and could make you vomit

Monarch butterflies and a few other insects evolved essentially the same genetic mutations allowing them to eat toxic milkweed without getting sick. Monarch butterflies and caterpillars store the toxins to deter predators. Scientists have now used CRISPR gene editing to make these same mutations in fruit flies, successfully conferring toxin resistance. This is the first time an animal has been genetically engineered to eat a new food and employ a new type of deterrence.

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Biologists track the invasion of herbicide-resistant weeds into southwestern Ontario

A team led by biologists have identified the ways in which herbicide-resistant strains of the invasive common waterhemp weed have emerged in fields of soy and corn in southwestern Ontario. The resistance, first detected in 2010, spread thanks to two mechanisms: either pollen and seeds of resistant plants were physically dispersed by wind, water and other means, or resistance appeared through the spontaneous emergence of mutations that then spread.

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Purple martin migration behavior perplexes researchers

Purple martins will soon migrate south for their usual wintertime retreat, but this time the birds will be wearing what look like little backpacks, so scientists can track their roosting sites along the way. The researchers recently discovered that purple martins are roosting in small forest patches as they migrate from North America to Brazil, an unexpected behavior.

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Scientists connected fragments of pine savanna and new species keep showing up

By connecting small, restored patches of savanna to one another via habitat corridors at an experimental landscape within the Savannah River Site in South Carolina, a nearly 20-year-long study has shown an annual increase in the number of plant species within fragments over time, and a drop in the number of species disappearing from them entirely.

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