KATHMANDU, Nepal—Four men left London’s Heathrow Airport for Nepal on a May afternoon. Within five days, they were atop Mount Everest, the 29,000-foot peak where an ascent typically takes weeks of ...

For nearly half a century, NASA has been talking an awfully good game about its much-heralded Mars Sample Return (MSR) project. As long ago as 1978, the space agency requested funding to develop a ...