Stories by Ellen Rykers

Caves created by rivers of lava underlie New Zealand’s biggest city. A new research project is documenting Auckland's lava caves, hoping to protect this hidden geological heritage and understand what… Audio

Every year, tens to hundreds of seabirds fall out of the sky across Auckland city. Disoriented by the bright lights, Cook's petrels crash-land and collide with buildings – but a dedicated group of… Video, Audio

Sunfish are the world's largest bony fish species – and yet scientists know little about their lives. This week, Our Changing World meets a sunfish researcher unravelling mola mysteries and dives into… Audio

The eruption of Hunga Tonga Hunga Ha'apai in January triggered a tsunami of unprecedented proportions, impacting the entire Pacific. How did this volcanic eruption lead to a tsunami detected across… Video, Audio