Genomic analyses reveal that the polar bear evolved between 4 and 5 million years ago, far earlier than previous studies had estimated.
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A relatively new pair of sex chromosomes in the fruit fly allows researchers to track their evolution from the beginning.
The recently hyped amoeba-flagellate Collodictyon has many secrets to tell about early eukaryotic evolution.
Louisiana’s salt marshes are recovering from the Deepwater Horizon oil spill, but some areas have been irreversibly lost.
The second of the two controversial bird flu papers is published in Science, revealing that just five mutations can render the virus transmissible between ferrets.
Radioactive particles from the Fukushima nuclear disaster provide an unexpected way to track migratory marine species.
Plant pests are evolving to outsmart common herbicides, costing farmers crops and money.
Ancient bacteria living in deep-sea sediments are alive—but with metabolisms so slow that it’s hard to tell.
Orange-loving Trinidad guppies are curiously attracted to orange spots on prawn pincers, which may make it easier for the predators to snatch them up.
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