Scientists reveal Black Hole's plummet; strange zone around black holes discovered.
Black holes are among the most fascinating objects in our universe, although little is known about them since Albert Einstein predicted them. Watch the story to learn more.
South African building collapse: Teams race against the clock to find survivors.
Rescuers are racing against the clock to reach at least 39 people trapped beneath a collapsed building in George, South Africa. The structure was under construction when it collapsed two days ago, killing at least seven people.
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