A US study has found that tens of thousands of lives could have been saved if lockdown measures had begun even just days earlier. Meanwhile, the Navajo Nation has surpassed New York in the number of coronavirus cases per capita. We also head to Antarctica, where green algae blooms are spreading and penguin poop is emitting laughing gas. Finally, from "antivax" to "coolitude", some of the new words being added to France's Larousse dictionary.