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Although the nearly 21 million miles of paved roads around the globe appear static, their environmental footprints are anything but set.

Researchers at the University of Oxford have confirmed that human activity and other external factors are responsible for the rise in global temperature. 

A new study in the American Journal of Preventive Medicine, published by Elsevier, demonstrated that employees at a large urban hospital who purchased the least healthy food in its cafeteria were more likely to have an unhealthy diet outside of work, be overweight and/or obese, and have risk factors for diabetes and cardiovascular disease, compared to employees who made healthier purchases. 

Scientists at the Max Planck Institute for Solar System Research (MPS), the Georg August University of Göttingen, and the Sonneberg Observatory have discovered 18 Earth-sized planets beyond the solar system. 

Newly discovered layers of ice buried a mile beneath Mars’ north pole are the remnants of ancient polar ice sheets and could be one of the largest water reservoirs on the planet, according to scientists at The University of Texas at Austin and the University of Arizona.