Concrete: A hard material engineers hope to make harder

For thousands of years, people have built civilizations with concrete made from readily available local materials. Just mix and heat, add some sand, stone and water and put it where you want it. Of course, give it time to ...

Genomic study reveals clues to wild past of grapes

About 22,000 years ago, as the ice sheets that consumed much of North America and Europe began retreating, humans started to consume a fruit that today brings joy to millions of wine drinkers around the world: grapes.

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