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Articles on North America

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Tyrannosaurus Rex was the top predator in North America just before dinosaurs went extinct at the end of the Cretaceous Period. (Shutterstock)

The discovery of two giant dinosaur species solves the mystery of missing apex predators in North America and Asia

Two recent discoveries in Alberta and Uzbekistan have identified the top predators in those regions during the Cretaceous period. Fossils that had been in storage for years included the jawbones.
A burned ‘Caution: Children at play’ sign remained after a wildfire devastated the town of Berry Creek, Calif., in 2020. Carolyn Cole/Los Angeles Times via Getty Images

US Climate risks are rising – a scientist looks at the dangers her children will have to adapt to, from wildfires to water scarcity

The author’s 9-year-old son will likely face about four times as many extreme events in his lifetime as older adults today. An international report explains the impacts already being felt.
More milk from these Wisconsin dairy cows may find its way to Canada under the new trade deal. Reuters/Darren Hauck

How is new NAFTA different? A trade expert explains

Canada, the US and Mexico have signed a deal to rip up the 25-year-old NAFTA and replace it with something new. But what’s actually changed?
Canadian Lt. Gen. Pierre St-Amand is seen on Parliament Hill in September 2017 where he appeared as a witness at a House of Commons national defence committee. The deputy commander of NORAD said North American defence needs to evolve to meet modern threats. THE CANADIAN PRESS/Sean Kilpatrick

NORAD’s struggle for relevance on its 60th birthday

NORAD is celebrating its 60th anniversary this May. New challenges face Canada and the U.S. now and in the coming years. How will NORAD evolve?
Canada has done a remarkable job of reducing lead in people’s bodies. But the experience of Flint, Mich. – where children were exposed to toxic levels of lead – teaches us to remain cautious. Here, Flint citizens watch testimonies before the House Oversight and Government Reform Committee, in Washington during 2016. (AP Photo/Andrew Harnik)

From IQ to blood pressure, we should not be complacent about lead

Reduced lead exposure has made us smarter and healthier. Could changes in regulatory agencies across North America endanger this?
Two Canadian soldiers during a 2011 NATO exercise in Ukraine. U.S. Army Europe/Flickr

‘Warrior nation’ or ‘peacekeeper’: Canada’s dilemmas

Over its history Canada has built itself through war and the memory of its wars. The country’s recent military interventions are part of a struggle to define what the country stands for.
Increasing emissions from Canada’s oil and gas sector will make Canada’s post-2020 pledge very difficult to achieve. kris krüg/Flickr

Canada’s climate target is a smokescreen and full of loopholes

This month Canada revealed its post-2020 climate target as 30% below 2005 levels by 2030. But current policies make it unlikely Canada will achieve the target within the country.

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