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The Punch Powertrain Solar Team car from Belgium competes in the 2017 World Solar Challenge near Kulgera, Australia. AP Photo/Geert Vanden Wijngaert

Why aren’t there solar-powered cars?

It’s common to see solar panels on rooftops and fields, but they aren’t widespread on cars − yet.
A genetic match to an ancient person doesn’t mean you’re more related genealogically. Mark Edward Atkinson/Tetra Images via Getty Images

DNA says you’re related to a Viking, a medieval German Jew or a 1700s enslaved African? What a genetic match really means

Genealogical and genetic ancestors aren’t the same thing. A DNA match − or a lack of one − may not tell you what you imagine it does about your family tree.
Two travel nurses talk on FaceTime with their 4-year-old son while working far from home at a field hospital set up to handle a surge of COVID-19 patients in 2021. AP Photo/David Goldman

Many travel nurses opt for temporary assignments because of the autonomy and opportunities − not just the big boost in pay

A new study found that temporary assignments in new places reignited nurses’ passion to help others and helped them rediscover the meaningfulness of their work.
In this aerial image, the steel frame of the Francis Scott Key Bridge sits on top of a container ship after the bridge collapsed in Baltimore on March 26, 2024. Jim Watson for Getty Images

Failure of Francis Scott Key Bridge provides future engineers a chance to learn how to better protect the public

A bridge engineering expert discusses the costs and limitations of building structures to withstand extreme events – and what it takes to prepare the next generation of civil engineers.