The astronaut who prompted NASA's first medical evacuation earlier this year said Friday that doctors still don't know why he suddenly fell sick at the International Space Station.

Amid Prime Minister Mark Carney’s calls that the Canada-U.S. relationship is ruptured, Ottawa has committed $175-million to a mining project in northern Quebec whose major U.S. investor is closely linked to the Trump administration.

Angelika Langen, co-founder of the Northern Lights Wildlife Society, tells The National about the moment her shelter rescued an abandoned bear cub near Kamloops, B.C.

In this issue of our environmental newsletter, we get the latest scientific estimate of how many birds cats kill each year; check out the forecast for this year's El Niño; and find out what's in the e-waste Canadians throw out (hint: a lot of good stuff).

Alexander Bentley, a herpetologist, is unfazed by cordyceps' presence in the Amazon. But after a finger poke of a fungi-covered mass showed movement, Bentley soon realized that one spider had a couple of tricks up its eight sleeves.

Migratory species such as the snowy owl, hammerhead shark and others are being considered for additional protections at global talks in Brazil. Here's what is endangering them and what is being proposed to help.

Biruté Mary Galdikas, a Canadian scientist who dedicated her life to the study and conservation of orangutans, has died. She was the last living member of the renowned primatologists known as "trimates," alongside Jane Goodall and Diane Fossey.

Parks Canada has announced restrictions on paddling in some rivers and lakes in Alberta to prevent the spread of aquatic invasive species. Some paddlers are voicing concerns with the new policy, but urge their community to comply.

Three Nova Scotian geoscientists have returned from a month-long expedition to Antarctica and now hope to inspire other women to enter their field of work.

NASA is pausing plans to deploy a space station in lunar orbit and will instead use its components to construct ‌a $20 billion base on the moon's surface over the next seven years, its new chief Jared Isaacman said on Tuesday.

Kejimkujik National Park is pausing its annual brook trout census because an invasive species is devastating the local ecosystem.

New research is suggesting that not all sharks are the lone, cold, ruthless predators as many films so often depict them. Some species, it turns out, can even be friendly — at least among their own kind.

Arborist Tyler Sirrs saw social media posts about a cat stuck for days in a tall tree in Orléans and decided to help. He described the rescue to CBC Ottawa Morning host Rebecca Zandbergen.

Spring is heralded by the return of geese, but to many in Alberta's poultry industry, migration means something different. With last year's avian flu season considered the worst in years, farmers are being mindful to avoid their flocks contracting the disease.

The national park in Alberta saw 4.5 million visitors in the 2025-26 fiscal year, surpassing the previous high of 4.28 million in 2023-24, in what’s become almost annual increases over the last decade.

A new study from the University of British Columbia is raising concerns about the environmental impact of artificial turf fields across Metro Vancouver, which, it says, is leaching a chemical into municipal stormwater systems that’s deadly to coho salmon.

University of Alberta and Department of National Defence researchers have developed a tiny battery-free sensor that can be used to track vital signs of soldiers in the field, including checking for risk of frostbite in extreme cold.

Alberta Fish and Wildlife Enforcement Services is investigating the death of a grizzly bear found with a gunshot wound last November. Through the province's Report A Poacher program, a tipster who provides information leading to charges being laid could be eligible for a cash reward.

As part of its 2026-2027 departmental plan, the Canadian Space Agency (CSA) has cancelled its ambitious lunar rover that would have landed at the moon's south polar region.

Rats have taken over a parking lot in the middle of several apartment complexes in north Dartmouth. Residents say the problem is so bad the rats are chewing through the wires of parked vehicles, causing thousands of dollars in damages.