Scientists recorded audio and video of 8 different kinds of rockfish living in the wild near British Columbia, and were surprised they could tell the species apart through their various grunts, pops and knocks, even though the fish are closely related.

PLUS:

• DNA identifies four Franklin Expedition sailors — and solves a 160-year-old mystery
• Immune cells that fight infection get a boost from food
• Radio waves let us see the unseeable: black holes, pulsars and volcanoes on Venus
• From the archives: What will the Earth look like in 2050?
• Quirks Question: If chicken and fish blood is red, why are they white meats?

In a study inspired by a field of dandelions, researchers wanted to know why, when you blow on a dandelion seed head, only the seeds closest to you take flight. They found that a dimple in the seed heads where the seed attaches is larger on one side than the other, and that the seeds consistently broke off from the smaller side of that dimple. Once they take flight, each dandelion seed uses its unique shape to catch a ride on the wind.

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• Infrasound, not ghosts, may be why old buildings give us the heebie-jeebies
• These arms are made for lovin'. How male octopuses find their mates
• From the archives: Donald Johanson on the discovery of 'Lucy,' our missing link
• Virtual hearts help doctors fix patients’ life-threatening irregular heart beats
• Quirks Question: What’s the benefit for trees being evergreen?

On the morning of August 10, 2025, a landslide in a fjord along the southern Alaskan coast triggered a mega tsunami. It generated the second highest wave ever recorded that reached up to 481 metres above sea level. A new study suggests that catastrophic events like this are more likely to occur as our climate warms and glaciers melt.

PLUS:

• The hantavirus at the centre of the outbreak struck Argentina in 2018. What did we learn?
• Raccoons enjoy solving puzzles, just for the fun of it
• What animal parents and distant humans can teach us about caregiving
• From the archives: face to face with the man who killed Pluto
• Quirks Question: why do my car windows make a ‘wha wha wha’ sound?