CNN's Dan Rivers has left cyclone-ravaged Myanmar after sneaking into the country without the knowledge of the nation's secretive ruling junta. The government hunted the journalist even as it seized food aid and kept out relief agencies. "They're turning a bad situation into ... what really is criminal negligence on a massive scale," Rivers says.

The campaign for Sen. Barack Obama today announced the support of four new superdelegates -- including a previous backer of Sen. Hillary Clinton. The latest announcements narrow Clinton's lead in superdelegates to single digits. At the year's start, she led by more than 100 superdelegates.

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A Canadian train quarantined after a passenger died Thursday will soon be on its way again, Ontario's top medical officer told reporters.

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Arkani-Hamed is only in his mid-30s, but he has already distinguished himself as one of the leading thinkers in the field of particle physics. His revolutionary ideas about the way the universe works will finally be put to the test at Switzerland's Large Hadron Collider.

We've sent the card, ordered the flowers for Mother's Day -- and we may even plan to call her. But if you had to describe everything your mom means to you in a single word -- what would it be? That's the assignment these iReporters accepted. Listen to what word they chose.