A Waterloo, Ont., professor says he’s once again figured out the best time to play the online portion of the Tim Hortons Roll Up To Win game for the highest chances of prizes. But he adds the coffee shop chain’s decision to bring back the physical cups this year has made strategizing "drastically more complicated."

As astronauts Butch Wilmore and Suni Williams acclimatize to Earth, the effects of being stranded in space for nine months, and their recovery, will give scientists a chance to improve preparations for long distance flights.

Bird experts agree Creamsicle is rare — and potentially even unique  — in its colouring. But they disagree about what’s behind the orange feathers. It could be a genetic mutation, an unfortunate accident, or the work of "nefarious miscreants."

The City of Toronto's response to a series of coyote attacks in downtown neighbourhoods aligns with best practices found in other cities, and problem animals should only be destroyed as a last resort, according to a new report. One woman who's dog was attacked and killed last fall says she was disappointed by the report's lack of a detailed plan.

After a week-long trip to the International Space Station ballooned into a nine-month stay, NASA astronauts Barry (Butch) Wilmore and Suni Williams are finally home.

NASA astronauts Butch Wilmore and Suni Williams departed the International Space Station early on Tuesday morning in a SpaceX capsule for a long-awaited trip back to Earth, nine months after their faulty Boeing Starliner craft upended what was to be a roughly week-long test mission.

Studies on Antarctica have documented how temperatures, glaciers, oceans and wildlife are reacting to the warming consequences of fossil fuel emissions. A place this remote and isolated makes a perfect laboratory for grasping the past, present and future of the Earth's climate, according to many scientists drawn to this fragile continent.

The hawk's presence at the Burnaby eco-centre deters local birds.

A SpaceX capsule delivered four astronauts to the International Space Station early Sunday in a NASA crew-swap mission that will allow a pair of stuck astronauts to return home after nine months on the orbiting lab.

Michael Schwinghamer has a passion for shipwrecks and is on a mission to capture them in their watery graves — leaning on his background in surveying and diving. His 3D renderings of ships lying on the sea floor could be the last glimpse before they’re gone forever. CBC’s Dave Irish explains.

Ancient mammals that lived in the time of dinosaurs were mostly the same dark-brown colour, according to a new study providing clues about how those mammals evolved in a time where they faced giant predators.

The replacements for NASA's two stuck astronauts launched to the International Space Station on Friday night, paving the way for the pair's return after nine long months.

With a whopping total of 274 moons, researchers say Saturn’s tug of war with Jupiter for the title is settled once and for all.

In this week's issue of our environmental newsletter, we learn about a recycling workshop that engages people with joy and humour, look at why eastern monarch butterflies had a good year, and check out plans to plant millions of trees from local seeds in N.W.T.

Whooping cranes have a remarkable recovery story. Meet some of the scientists bringing them back, in the documentary Dances With Cranes.

NASA and SpaceX have delayed the launch of a replacement crew of four astronauts to the International Space Station that would have set in motion the long-awaited homecoming of U.S. astronauts Butch Wilmore and Suni Williams.

A NASA telescope was launched into space from California on Tuesday for a mission to explore the origins of the universe and to scour the Milky Way galaxy for hidden reservoirs of water, a key ingredient for life.

Meteorologists and scientists in Atlantic Canada are concerned about cuts to the National Oceanic and Atmospheric Administration, saying they rely on the U.S. agency's data and expertise.