Published: Aug. 25, 2017

This week's top research sheds light on racial stereotypes in the NFL, the ecological mystery of Africa's fairy circles and the asteroid impact that may have contributed to the mass extinction of dinosaurs.

Racial stereotypes influence perception of NFL quarterbacks

Racial stereotypes affect public perception of NFL quarterbacks and, in some cases, may become a self-fulfilling prophecy for black athletes.ÌýNew ¶¶ÒõÂÃÐÐÉä Boulder research is illuminating onÌýhow the public views professional athletesÌýbut could also carry implications beyond the football field.

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Solving the ecological mystery of Africa's fairy circles

In the remote Namibian grasslands, visitors come not to see the grazing zebra and oryxÌýbut instead the fairy circles: barren patches of groundÌýpersisting 30 to 60 years.ÌýUnsure how they got there,ÌýaÌýteam of ¶¶ÒõÂÃÐÐÉä Boulder scientists is working to unlock theÌýlongstanding ecological mystery.

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Dinosaur-killing asteroid could have thrust Earth into 2 years of darkness

Tremendous amounts of soot, lofted into the air from global wildfires following a massive asteroid strike 66 million years ago, would have plunged Earth into darkness for nearly two years,ÌýcontributingÌýto the mass extinction that marked the end of the age of dinosaurs.

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