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Articles on Seasonal change

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Scientists have used author Henry David Thoreau’s notes to inform studies of climate change in eastern Massachusetts. Tom Stohlman/Flickr

By fact-checking Thoreau’s observations at Walden Pond, we showed how old diaries and specimens can inform modern research

Journals, museum collections and other historical sources can provide valuable data for modern ecological studies. But just because a source is old doesn’t make it useful.
Winter road salting is a common de-icing technique used to ensure public safety during icy winters. However, it is crucial to find sustainable and environment-friendly alternatives to road salt. (Shutterstock)

Winter road salting has year-round consequences

Salty water seeps into our soils and groundwater through surface runoff and storm-water pipes. The long-term storage of salt in the environment impacts aquatic life, infrastructure and drinking water.
A volunteer looks for waterbirds at Point Reyes National Seashore in California during the National Audubon Society’s annual Christmas Bird Count. Kerry W/Flickr

Citizen scientists are filling research gaps created by the pandemic

COVID-19 kept many scientists from doing field research in 2020, which means that important records will have data gaps. But volunteers are helping to plug some of those holes.
Night sky over Lake Tyrrel in Western Victoria – home of the Wergaia people. Alex Cherney

Stories from the sky: astronomy in Indigenous knowledge

Indigenous Australian practices, developed and honed over thousands of years, weave science with storytelling. In this Indigenous science series, we’ll look at different aspects of First Australians’ traditional…
Watching the sun over a nature reserve in ACT, Australia. Flickr/Andrew

Explainer: what makes the spring equinox?

It’s the time of the equinox or more specifically the spring equinox for us in the southern hemisphere. The equinox is a midpoint. It’s around now that day and night become equal in length (but more about…

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