The polar vortex is a large area of low pressure and cold air surrounding the Earth's North and South poles.
The Science Behind the Polar Vortex
articles
Tropical Cyclone Riley Triggers Australia Warnings
System 94S developed about 240 miles west-northwest of Darwin, Australia on Jan. 22, 2019. The next day, it had strengthened into a tropical cyclone, and was named Riley.
Penn Engineer’s ‘Metallic Wood’ Has the Strength of Titanium and the Density of Water
High-performance golf clubs and airplane wings are made out of titanium, which is as strong as steel but about twice as light.
Scientists Tackle Breeding Challenges of Land Mine-Finding Rats
Thousands of people – many of them children – are hurt or killed by land mines each year, so finding these devices before they explode is critical.
Cassava High in Iron and Zinc Could Improve Diets and Health in West Africa
The “hidden hunger” caused by micronutrient deficiency is a global threat to human health, with particularly severe impacts in Africa.
Climate Change Reshaping How Heat Moves Around Globe
The Earth’s atmosphere and oceans play important roles in moving heat from one part of the world to another, and new research is illuminating how those patterns are changing in the face of climate change.
