North-central Pennsylvania is canyon country with an Appalachian flair. Pine Creek Gorge reaches depths of about 1,500 feet (460 meters) along its gently curving path through the forests of the Allegheny Plateau. Instead of the steep rock walls characteristic of canyons in the desert Southwest, lushly vegetated slopes outline the dramatic topography. In autumn, greens
Explanation: What’s causing this unusually long cloud on Mars? Known as the Arsia Mons Elongated Cloud (AMEC) and first recorded by NASA’s Viking Orbiter 2 in 1977, the strange cloud has been imaged in greater detail more recently by ESA’s robotic Mars Express spacecraft. The featured image is from 2018. The cloud forms only during spring and
General We assess the sectoral and subsectoral WD for the years 2020 and 2010, for municipal WD, irrigation, livestock, the manufacturing industry, electricity production and mining. WD is the volume of water used by a sector to satisfy its needs, if sufficient water is available1,2,8. When sufficient water is not available, the need is not
Mouse models The animal experimental procedures were conducted in strict compliance with the guidelines established by Weill Cornell Medicine, following the Guide for the Care and Use of Laboratory Animals, and the standards set by the Association for Assessment and Accreditation of Laboratory Animal Care International. The Research Animal Resource Center, Weill Cornell Medicine’s Institutional
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Gravity is a cruel mistress, slowly dragging the famed telescope ever closer to its ultimate demise with every day. Hubble is in no immediate danger of burning up in the Earth’s atmosphere, but its time will run out in the early to mid 2030s unless its orbit is boosted. So NASA is taking proposals from