These include the stress of injury or of seeing an expedition partner become injured or even die.

VOA: special.2010.02.24

Mallory was invited back to Everest as lead climber of another expedition team in nineteen twenty-four.

VOA: special.2010.06.30

A few days earlier, expedition leader Edward Norton had reached a record height of eight thousand five hundred seventy-three meters before he turned back.

VOA: special.2010.06.30

In eighteen thirty-nine the American Naval officer Charles Wilkes led an expedition to the continent.

VOA: special.2009.06.03

The researchers will sail for Antarctica early next month, in an expedition funded by the Australian and New Zealand governments.

VOA: standard.2010.01.05

He says the experiment will pave the way for a real Mars expedition later this century.

VOA: standard.2010.06.02

Carolyn Maloney's own tragedy struck last September, when she learned that her husband of 31 years had died on a mountain trail, during an expedition to the Himalayas.

VOA: standard.2010.08.07

Nick Gales from the Australian Antarctic Division leads the expedition.

VOA: standard.2010.01.05