Chemistry
Chemists have unlocked the secrets of long-lasting Roman concrete
By searching ancient texts and ruins, scientists found a concrete recipe that could make buildings stronger — and help address climate change.
HS-ESS3-3
Create a computational simulation to illustrate the relationships among management of natural resources, the sustainability of human populations, and biodiversity.
More Stories in HS-ESS3-3
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ClimateEight ways you can cut your carbon footprint
Learn how you can limit the climate-warming gases associated with what you eat, the products you buy and the energy you use.
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ClimateThe world is aiming for ‘net zero’ emissions of greenhouse gases
Nations are charting how they might ‘zero’ out their releases of climate-warming gases. Success might greatly lower the risks of climate catastrophes.
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EnvironmentGas stoves can spew lots of pollution, even when they’re turned off
A new study finds they can leak benzene and other harmful chemicals into homes, sometimes at very high levels.
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ClimateGreen energy is cheaper than fossil fuels, a new study finds
Switching over to clean, renewable power — and away from fossil fuels — could save trillions of dollars by 2050, a new study finds.
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EnvironmentMicroplastic pollution aids viruses and prolongs their infectivity
The tiny plastic bits give these germs safe havens. That protection seems to increase as the plastic ages and breaks into ever smaller pieces.
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AnimalsStudy finds big drop in animal populations since 1970
But the same thing is not happening throughout the kingdom. For instance, more than half of vertebrate populations are stable or increasing.
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AnimalsCougars pushed out by wildfires took more risks around roads
After an intense burn in 2018 in California, big cats in the region crossed roads more often. That put them at higher risk of becoming roadkill.
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AnimalsCars hit more deer in the week after daylight saving time ends
In the days right after most Americans turn back the clock, vehicle crashes with deer increase by 16 percent, a new study shows.
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EnvironmentThis chemist uses online videos to teach about the perils of microplastics
Imari Walker says her journey as a scientist and science communicator lets her talk about and advocate for her passion.