race weapon perception experiment object held Black white man

Race affected weapon perception in one experiment

In one experiment, people were more likely to mistake an object for a weapon when a Black man held it than when a white man did. The finding concerns perception, not just how people judge what they see.

Food irradiation kills microbes without making food radioactive

Food can be exposed to controlled doses of ionizing radiation to reduce harmful microbes, insects and spoilage. The energy damages microorganisms, but the treatment does not leave the food radioactive. It is a preservation method, not the same thing as contaminating food with radioactive material.

Britain lost its land links in two stages

As sea levels rose after the last ice age, Britain first lost its land connection to Ireland about 10,000 years ago. Around 2,000 years later, rising water also cut its remaining land connection to mainland Europe.

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race weapon perception experiment object held Black white man

Race affected weapon perception in one experiment

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