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a large open museum floor with multiple dinosaur skeletons

Earth & Environment

Volcanoes Signaled the End for Dinosaurs

Jesse Rogerson, PhD

Canada Aviation and Space Museum

A study published in the journal Proceedings of the National Academy of Sciences (PNAS) has concluded that a mass extinction event allowed for the rise of the dinosaurs. At the end of the Triassic period, approximately 200 million years ago, a period of 'pulsed volcanism' radically changed the climate of Earth, leading to the eradication of many species. The vacant ecological niches led to the rise of the dinosaurs. The study relied on measuring the concentration of mercury levels in rocks from

A satellite image of the Patuxent River.

Earth & Environment

A Senator and a Citizen Scientist

Jesse Rogerson, PhD

Canada Aviation and Space Museum

Senator Bernie Fowler from Maryland, USA has been measuring the clarity of the water in the Patuxent River every June for the last 30 years. His chosen method of measurement? White sneakers. He wades into the river until he cannot see his white sneakers anymore and then records how deep the water is at that point. Some years he can wade in much further than others. What began as a simple test of the health of Maryland's waters has turned into a 30 year long citizen science and public outreach

An adult male looks for seal pup lairs under the snow in western Hudson Bay (photo credit: David McGeachy)

The polar bear and the volcano

Environment and Climate Change Canada

When Environment and Climate Change Canada scientist emeritus Ian Stirling started polar bear research in western Hudson Bay in the 1980s, he never imagined that it would become the first research program in the world to demonstrate the effects of climate change on polar bears. Stirling started the research program simply because the scientific community didn’t know much about polar bears at the time. There was a need to answer some fundamental ecological questions. He and a small research team

A satellite image of the arabian sea.

Earth & Environment

What Can We Learn from Sunglint?

Jesse Rogerson, PhD

Canada Aviation and Space Museum

It's amazing what you can learn from a picture. Take, for instance, this shot taken by NASA's Terra Satellite. It is of the Arabian Sea near Oman. The Sun can easily be seen reflecting off the still water of the sea back to the satellite, a phenomenon known as called 'sunglint.' But what about the dark, snake-like feature stretching through the middle of the reflection? Turns out... it's choppy water! The wind churns the water slightly, making it not as reflective as still water. Using an image

An image of a mastadon thigh bone

Earth & Environment

When Did the First Humans Move onto North America?

Jesse Rogerson, PhD

Canada Aviation and Space Museum

Scientists have re-examined Mastadon bones found in the San Diego area in 1992. They find the bones to be over 100,000 years old. Moreover, the bones appear to have been broken by humans. This means that modern humans may have travelled to North America fare earlier than is commonly accepted, which is about 15,000 years ago.

A satellite image of Batagaika Crater in Siberia, Russia.

Earth & Environment

Batagaika Crater Expands

Jesse Rogerson, PhD

Canada Aviation and Space Museum

The Batagaika Crater is not a crater at all, but a depression in northern Russia. It is being caused by the thawing of permafrost, and depressions like this are occurring all over the north. Batagaika is by far the largest depression. Its erosion has been documented by satellites, and now appears to have doubled in area since 1999. While depressions like this are a result of climate change, they also allow scientists to easily study things that were once buried.

Natural gas from farm waste

Earth & Environment

Natural gas from farm waste

Britannia Mine Museum

Believing there is a more sustainable way to farm, this Canadian company turns farm waste into natural gas and organic fertilizers. In 2010, Fraser Valley Biogas was the first facility in North America to produce and supply renewable natural gas to customers through a utility company. By processing over 30,000 tons of organic waste per year from local farms, the company captures methane that would otherwise be released to the atmosphere. By capturing the methane, which has twenty-one times the

False colour images indicating where icebergs have gouged the sea floor.

Earth & Environment

Iceberg 'Doodles' Trace Climate History

Jesse Rogerson, PhD

Canada Aviation and Space Museum

Here's some interesting #sciArt for ya. These great gouge marks are left behind when a large iceberg drags across the bottom of the seabed. A large collection of these images has just been published, with the help of 250 scientists from 20 different countries. By gathering this high-resolution atlas of the seafloor, scientists can better determine how the climate is changing.

Satellite image of the snowpack in the Sierra mountains

Earth & Environment

The Snowpack in the Californian Mountains Quadruples

Jesse Rogerson, PhD

Canada Aviation and Space Museum

Data from NASA's Airborne Snow Observatory shows that the snowpack in the Tuolumne Basin of the Sierra Nevada mountains is 1.5 cubic kilometers, which is more than the previous 4 years combined. Californians are surely enjoying the extra precipitation, as they have been in a drought for the last 5 years. The Airborne Snow Observatory uses a combination of LIDAR and Imaging Spectrometer fixed to a small plane to measure the snowpack in the mountains of California.

Seaweed: From superfood to superconductor

Engineering & Technology

Seaweed: From superfood to superconductor

Seaweed, an edible algae with a long history in Atlantic Canada (e.g. dulse seaweed) and some Asian cuisines, could turn out to be an essential ingredient in another trend: the development of more sustainable ways to power our devices. Researchers are using a seaweed-derived material to replace traditional non-renewable carbon materials to help boost the performance of superconductors, lithium-ion batteries and fuel cells in a sustainable way.

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