2017 was record-setting for warmth | | NASA says 2nd-warmest year on record. NOAA says 3rd-warmest. Their methodologies differ slightly, but - by both standards - the past 4 years are the hottest yet recorded. | | |
Saturn moon Titan has a sea level | | A new topographic map of Titan, plus a new study showing that Saturn's seas lie at an average elevation - a sea level - just as Earth's do. | | |
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