A genomic analysis of 281 cockroaches collected from 17 countries around the world suggests that Blattella germanica, the German cockroach, originated in India or Myanmar around 2,100 years ago.
People with two copies of the gene variant APOE4 are almost certain to get Alzheimer’s, say researchers, who proposed a framework under which such patients could be diagnosed years before symptoms.
Coloured scanning electron micrograph (SEM) of a water bear, or tardigrade (phylum Tardigrada). Water bears are small, water-dwelling, segmented micro-animals with eight legs that live in damp habitats such as moss or lichen.
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