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Life & Evolution

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Loxosceles gaucho recluse spider

The Loxosceles gaucho recluse spider (left) can kill a heavily armored Mischonyx cuspidatus harvestmen (right) by disabling its weak spots, a new study finds. Here the spider is inflicting a long bite to a joint on the harvestman’s third leg.

Pseudomonas fluorescens

Two mutations allowed soil bacteria (Pseudomonas fluorescens) to re-evolve flagella: One pumped up levels of a protein than controls nitrogen uptake, and one that switched that protein’s job to flagella production control.

AFTERMATH  Intimate mating concerns among Anopheles mosquitoes may have inadvertently pushed the evolution of greater ability to spread human malaria.

Life & Evolution

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