Hidden beneath quiet suburban streets are clues to Auckland’s tumultuous geological past: lava caves.


	Secret passages Hidden beneath quiet suburban streets are clues to Auckland’s tumultuous geological past: lava caves. Lava caves may just be the most delightful thing that Aucklanders don’t know about their city—hidden below the suburbs, beneath front lawns and corner dairies.

Big data to the rescue

Figuring out to stop nutrients from fertiliser and animal wastes flowing from land into waterways is difficult—but help is now on the way.

Light fantastic

University of Auckland professor Cather Simpson on solving problems with lasers.


	Islands in the sky Two years ago, a group of climbers, scientists and photographers spent more than 100 hours high in the boughs of giant rimu and kahikatea, capturing 120,000 images, 1200 video clips and 28 time-lapse sequences from the canopy. The result? An exhibition which has just opened at the Waikato Museum. The New Zealand Tree Project's work also features in our story on the forest canopy, the last frontier of exploration.