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Regeneration in distantly related species: common strategies and pathways

All animals capable of regenerating a lost body part, from an organ or a limb to the whole organism, use a common set of genes. This is the striking discovery of a team of researchers from the Center for Complexity and Biosystems of the University of Milan, led by Caterina La Porta. They analyzed the genetic activity in regenerating tissues from widely different species—from hydra to mice. They found that some of the genes active at the beginning of the regeneration process are the same in very different species, including mammals which have lost this function during evolution, except for the restoration of the liver. The discovery of this shared genetic signature is of great importance to understand how regeneration evolved and could be useful for future regeneration therapies.

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This Giant Fireball Over Michigan Was Visible From Six States and Canada

The National Weather Service says that the most likely explanation for an object which sent out illumination and a sonic boom throughout southwest Michigan, five other states, and Canada on Tuesday night was the breakup of a meteor, WXYZ reported. The American Meteor Society collected at least 200 reports of the incident, which for around a second was so bright it lit parts of the Detroit region like it was daytime.