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When people navigate a new city or choose a restaurant in an unfamiliar area, they often rely on the wisdom of crowds. We consult the digital maps that track the movements of thousands of other commuters to avoid traffic jams, and we read dozens of internet reviews before spending our money.

Imagine an animal that began its life centuries before the Roman Empire reached its height and has quietly continued its daily routine ever since. According to recent reports, scientists have identified a giant Caribbean sponge believed to have lived for around 2,300 years, making it one of the oldest animals ever documented.

Seventy years can feel like a long enough stretch for an ecological experiment to settle into history, but the story of rabbits and a deliberately released virus keeps refusing to stay still. What began as a blunt attempt to rein in an exploding pest population has turned into something messier, almost reluctant in its persistence.

Regrowing a lost finger, hand or even an entire limb has long been considered impossible for humans.While salamanders and axolotls can regenerate limbs and some lizards can regrow their tails, mammals typically heal injuries by forming scar tissue instead. A new study from Texas A&M University has now challenged that long-held belief.