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This summer, coastal seas to the north and east of New Zealand are even warmer than during last year’s marine heat wave. from www.shutterstock.com

Coastal seas around New Zealand are heading into a marine heatwave, again

Marine heatwaves may become the new normal for the Tasman Sea and the ocean around New Zealand, and oceanographers are developing models to better predict their intensity.
Sea ice responds to changes in winds and ocean currents, sometimes with origins thousands of kilometres away. NASA/Nathan Kurtz

Why Antarctica’s sea ice cover is so low (and no, it’s not just about climate change)

Antarctic sea ice cover fell to an all-time low recently and hasn’t yet recovered. Why? The initial answers could lie in an unlikely place – the tropics.
Dead fish are a source of food for bacteria, which then extract oxygen from the river. AAP

How is oxygen ‘sucked out’ of our waterways?

Hundreds of thousands of fish have died in low-oxygen water. Here’s what actually happened to the oxygen, and why we might see more deaths in the coming weeks.
Photo by Mikhail Vasilyev on Unsplash

Curious Kids: do ants have blood?

Ants have something similar to blood, but it’s called haemolymph. Some insects use it in unusual ways. When threatened by a predator, blister beetles can squirt haemolymph from their knees.
Some dogs may associate car travel with trips to the beach or park – while others only remember trips to the vet. Linda Colquhoun/flickr

Curious Kids: is it true dogs don’t like to travel?

Travel can come with danger, so dogs have mostly evolved to avoid being over-adventurous. That said, dogs may see some kinds of travel as a chance to find things they want – like food or a mate.
Sadly, people plus beach equals litter, so be careful out there. Wikimedia Commons

Forget sharks… here’s why you are more likely to be injured by litter at the beach

One in five beachgoers has been injured by litter, with the most common incidents involving cuts and scrapes - but also including fractures, burns, poisonings and even blindness. So be careful out there.
Earthrise: astronauts aboard Apollo 8 captured this spectacular photo of Earth rising above the lunar horizon as they emerged from behind the dark side of the Moon. Image Credit: NASA

Earthrise, a photo that changed the world

Fifty years ago people saw our planet from the outside for the first time.