How did we come up with our system of telling time? Why do we divide the day into 24 hours of 60 minutes each, and put 60 seconds in each minute? Where does the definition of a second come from? And who decides what clock shows the correct time? There’s clearly a lot of questions when it comes to time.
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https://youtu.be/tjzzH2xikNA Check out what Science's editors deemed the top results of 2017, including our Breakthrough of the Year! Read more at: http://vis.sciencemag.org/breakthroug... read more
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Microplastic pollution, the northern lights, powered alcohol issues, and 3D printing - just the eager science minds want to hear about. This eclectic collection of current science news stories is... read more
Categories: All Science Teachers, Safety
WHMIS 2015 WHMIS 2015 covers a wide range of hazardous chemicals and substances (called “controlled products”), including everyday chemical products found in workplaces, such as cleaning... read more
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