A new study argues that Calbuco’s eruption stretched the Antarctic Ozone Hole — the thinnest portion of the ozone shell that shields Earth from harmful radiation — to a record size nearly as large as Africa.

The world’s lakes are only about two-thirds as deep, on average, as previously thought according to a mathematical analysis presented by Follows Group graduate student B. B. Cael at a meeting of the American Physical Society this week.

Over the next century, southern Africa will see widespread decreases in maize production.