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Mounded, luminous clouds of gas and dust glow in this Hubble image of a Herbig-Haro object known as HH 45. Herbig-Haro objects are a rarely seen type of nebula that occurs when hot gas ejected by a newborn star collides with the gas and dust around it at hundreds of miles per second, creating bright shock waves.

he Arctic Ocean has been getting warmer since the beginning of the 20th century – decades earlier than records suggest – due to warmer water flowing into the delicate polar ecosystem from the Atlantic Ocean.

New technological advancement uses an electric field to achieve efficient and low-cost ammonia removal from wastewater.

As autumn inches toward winter, seasonal changes emerge across the Northern Hemisphere. In mid-September 2021, vegetation on northeast Siberia’s Cape Navarin had already turned from green to brown, and snow covered some of the higher elevations.

New research from UC San Francisco that tested possible triggers of a common heart condition, including caffeine, sleep deprivation and sleeping on the left side, found that only alcohol use was consistently associated with more episodes of the heart arrhythmia.