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Each weekday morning, OurAmazingPlanet takes the pulse of the Earth, reporting on natural phenomena and exploration news from around the globe.

New Zealand Earthquake: A magnitude 6.3 earthquake rocked New Zealand's second-largest city, Christchurch, on Tuesday. At least 65 people were killed.

Nothing's Biting: By 2050, only small fish could be left in the world's oceans, said scientists this weekend at the American Association for the Advancement of Science's annual meeting.

Dixie Alley: A lesser known corridor of tornadoes may see severe weather this week. [Skyscraper Storms: 7 Big City Tornadoes ]

Previously on Our Daily Planet: Midwestern Floods and New Forest Rules

Reach OurAmazingPlanet staff writer Brett Israel at Follow him on Twitter @btisrael.