This week: A new study showing how you can, as a way to control their population, change blood-drinking female mosquitoes to male, non-biting mosquitoes by changing just one gene; research into new ways for robots to grab things; a study showing the ways in which the pupils of people who have PTSD react differently than others, even in emotionally-neutral situations; beavers in Alaska are working overtime in the Arctic tundra as a result of climate change and possibly damaging the ecosystem; and research examining how the Earth’s crust cracked in the first place.

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