Whales have some of the longest lifespans in the animal kingdom, with several whale species being recorded as living for more than 100 years. In the past, researchers have used several methods to measure the longevity of this these marine mammals. They count layers in their earwax, which increase year after year; they measure a chemical […]
Millions of dollars in funding but still no plan: can Quebec save its caribou from extinction?
The caribou of Quebec are at breaking point. The province, home to 15% of Canada’s population of woodland caribou, has seen numbers crash to about half of what they were a decade ago. For years, local First Nations people, researchers and environmental groups have criticised the provincial government’s lack of action on protecting caribou, an […]
“One is like a motorbike while the other is a pushbike…” What’s the difference between cold-blooded and warm-blooded animals?
What’s the difference between cold-blooded and warm-blooded? The animal kingdom can be split based on how body temperature is controlled (thermoregulation): ‘cold-blooded’ ectotherms use external sources of heat, such as solar energy, whereas ‘warm-blooded’ endotherms generate internal heat via metabolism. But while this difference helps define features and behaviour, some species show that the distinction […]
Copper boom fueling energy transition puts Earth’s wildlands at risk
In the high Andes of Peru, Bolivia, Chile and Argentina, you can still find the vicuña, a shy, elusive camelid, revered by Indigenous people. It has reasons to be cautious of humans. Long-prized for its fine wool, European colonists hunted it relentlessly. Flocks in the millions were reduced to 6,000 individuals by the 1960s. Indigenous-driven […]
“I was dragged into the murk. I clawed at the sand in hope of grabbing a rock to hit it with and pry my leg out from its jaws”
We were in the Jardines de la Reina archipelago off the south coast of Cuba, looking for the mysterious ‘Reina’ – a giant hammerhead that locals said had been spotted around the area. Interested to see if ‘Reina’ was indeed just one large female or in fact many different sharks, I decided to head into […]
Mass sardine die-off pits survival of South Africa’s penguins against fishers’ livelihoods
It began on 28 July, when fishers near Saldanha Bay on the west coast of South Africa reported seeing dead sardines (also known as pilchards) floating at sea. Then, in early August, more dead sardines began washing up on beaches near Cape Town. In the weeks that followed, similar reports came in from places across […]
Why do octopuses have three hearts, when humans only have one?
Compared to many other animals, octopuses have rather a complicated circulatory system to ensure oxygenated blood reaches the extremities of their multi-limbed body. Why do octopuses have three hearts? Octopuses pump their blood around their circulatory system using three hearts instead of one. While a ‘systemic’ heart supplies the animal’s body, two ‘branchial’ hearts supply […]
Pakistan expands protected habitat for Indus River dolphin as recovery offers hope
Between 11 million and 16 million years ago, during the high sea levels of the middle Miocene period, the ancestors of the Indus River dolphin entered the muddy waters of what is the Indus Basin today. Over millennia, they adapted to their new environment through extraordinary evolutionary shifts, developing sophisticated echolocation while gradually losing their […]