Jennifer Nalewicki

250 million-year-old pollen suggests radiation played a role in mass extinction event.

Researchers have developed a liquid-nitrogen spray that rids spacesuits of lunar dust.

A Bronze Age arrowhead found in Switzerland was made using meteoric iron.

Spiral petroglyphs carved into a canyon wall on the Colorado-Utah border may have been used as a calendar by the Ancestral Pueblo.

China’s new jumbo-size, reusable rockets are part of the country’s plans to send humans to the moon by 2030.

On March 28, Earth was hit by an X-class solar flare that was strong enough to ionize part of the planet’s atmosphere.