While their trip looked like fun during the numerous news conferences and videos we saw, the four astronauts were hard at work with scientific observations, medical experiments and exercise. And they also had to deal with unexpected issues.

Other countries, like the U.K, the United States and the European Union have all dedicated funding and detailed roadmaps to replace animal testing in research settings. And while Canada has a strategy to replace animals used in chemical and toxicity testing, there is still no plan for those used in biomedical testing.

A global assessment on migratory freshwater fish species, published in March, found that there are 325 species of migratory fish crossing international borders that need deliberate action in order to survive.

After slingshotting around the moon, the Artemis II mission is expected to splash down in the Pacific Ocean tonight. Canadian astronaut David Saint-Jacques knows exactly what hurtling back to Earth feels like.

The 2026 wildfire season may get off to a relatively quiet start in Canada but lingering drought and a warm summer could tip the scales towards another severe year, experts say.

Manitoba's government has relied on disposable N95 masks and training to help its firefighters deal with heavy smoke billowing from wildfires, but protecting them from the noxious gases remains a significant challenge.

Canadian Space Agency astronaut Jeremy Hansen, along with NASA astronauts Reid Wiseman, Victor Glover and Christina Koch, are returning to Earth after travelling around the moon. But before they get their feet on solid ground, they have to get their Orion spacecraft safely through Earth's atmosphere.

When we sent four humans 406,771 kilometres into space for the first time, we also sent a toilet with them. After all, if the plan is to go farther and farther, then it’s critical we test one of the non-negotiable parts of being human.

The 10-month standoff on a B.C. ostrich farm last year was the most expensive poultry cull in Canada’s history. A fifth estate investigation reveals the campaign to save the ostriches was based on falsehoods.

Environment and Climate Change Canada will use artificial intelligence to make its weather forecasts more accurate, the federal department said Thursday.

Emperor penguins, the largest penguin species, are now listed as endangered following a new international assessment of how climate change is affecting their habitat and population.

If the egg hatches, the chick will be the first of its species to be born and raised in the wild in Northern California in more than a century.

In this issue of our environmental newsletter, we see how some countries are using heat from nuclear power plants to heat homes; map the countries with the biggest potential to generate solar power; and learn about the government's new approach to protecting nature.

The PaRx program, an initiative that allows healthcare providers to prescribe nature passes to patients, is now available for Hamilton Conservation Authority (HCA) sites.

Human eyes are a wonder of nature. While we've invented the camera to work like our eyes, it's not as good as the real thing, something that was highlighted during Artemis II's lunar flyby.

The Artemis II crew woke to the sounds of Queen and David Bowie's classic Under Pressure as they continued their journey through space Wednesday. Now preparing for Friday's re-entry, the astronauts also reflected on watching the eclipse of the Earth, the camaraderie of the mission and humanity's purpose on Earth.

A new research facility in Sudbury, Ont., is testing whether bacteria could help solve two major challenges in mining: How to source critical minerals and what to do with the waste left behind. CBC recently toured the 10,000-square-foot pilot facility to speak to researchers and get a first-hand look at how bioleaching works.

In China, the energy landscape has reached a historic tipping point. For the first time, its total installed wind and solar capacity has officially surpassed that of coal. It’s a shift driven by massive industrial scale and artificial intelligence — and Chinese energy giants have their sights set on the Canadian wilderness.

The Artemis II crew is packing up to prepare for landing after a successful loop around the moon. The capsule is pointed back toward Earth, with a splashdown planned for Friday around 8:06 p.m. ET in the Pacific Ocean off the coast of San Diego, Calif., NASA officials say.

Fisheries Minister Joanne Thompson made the announcement in North Vancouver Tuesday, saying in a statement that the first five years of the initiative has shown what is possible when partners work together to restore habitat, expand hatchery programs, improve management and find new ways to protect vulnerable stocks.