A revived hypothesis argues that a fungus-filled world after the Chicxulub asteroid impact may have given mammals an evolutionary edge. The idea could reshape how scientists think about mass extinctions, but it is still controversial.
Source: [Live Science](https://www.livescience.com/animals/dinosaurs/did-fungi-give-mammals-an-evolutionary-edge-after-the-dinosaur-killing-asteroid-hit-new-evidence-revives-a-provocative-hypothesis)