Heavy sleepers: elephants on epic trek take nap

A herd of wild elephants in southwestern China have been captured on camera taking a breather from a 500-kilometre march of chaos that has caused more than $1 million in damage.

Huge sinkhole threatens to swallow Mexican home

A giant sinkhole that was expanding by dozens of meters each day has alarmed residents in a rural area of central Mexico where it was threatening to swallow a house.

Aging dams pose growing threat: UN

By 2050, most people on Earth will live downstream of tens of thousands of large dams built in the 20th century, many of them already operating at or beyond their design life, according to a UN University analysis.

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