![This first three-dimensional picture of Mars' north pole enables scientists to estimate the volume of its water ice cap with unprecedented precision, and to study its surface variations and the heights of This first three-dimensional picture of Mars' north pole enables scientists to estimate the volume of its water ice cap with unprecedented precision, and to study its surface variations and the heights of](https://c8.alamy.com/comp/2CF7BFG/this-first-three-dimensional-picture-of-mars-north-pole-enables-scientists-to-estimate-the-volume-of-its-water-ice-cap-with-unprecedented-precision-and-to-study-its-surface-variations-and-the-heights-of-clouds-in-the-region-for-the-first-time-approximately-26-million-of-these-laser-pulse-measurements-were-assembled-into-a-topographic-grid-of-the-north-pole-with-a-spatial-resolution-of-06-miles-one-kilometer-and-a-vertical-accuracy-of-15-90-feet-5-30-meters-the-principal-investigator-for-mola-is-dr-david-e-smith-of-goddard-the-mola-instrument-was-designed-and-built-by-the-laser-rem-2CF7BFG.jpg)
This first three-dimensional picture of Mars' north pole enables scientists to estimate the volume of its water ice cap with unprecedented precision, and to study its surface variations and the heights of
![Lightning strikes over Pacaya Volcano, while it erupts lava and ash in Amatitlan, Guatemala, January 17. The Pacaya volcano, some 30 miles (48 km) south of the capital, spewed lava 3,000 feet ( Lightning strikes over Pacaya Volcano, while it erupts lava and ash in Amatitlan, Guatemala, January 17. The Pacaya volcano, some 30 miles (48 km) south of the capital, spewed lava 3,000 feet (](https://c8.alamy.com/comp/2CP71YK/lightning-strikes-over-pacaya-volcano-while-it-erupts-lava-and-ash-in-amatitlan-guatemala-january-17-the-pacaya-volcano-some-30-miles-48-km-south-of-the-capital-spewed-lava-3000-feet-914-meters-into-the-air-rm-2CP71YK.jpg)
Lightning strikes over Pacaya Volcano, while it erupts lava and ash in Amatitlan, Guatemala, January 17. The Pacaya volcano, some 30 miles (48 km) south of the capital, spewed lava 3,000 feet (
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