Sunday's action over the four-mile cross-country course was suspended for the air ambulance to land on more than one occasion, with Germany's Ingrid Klimke and Ireland's Elizabeth Power both taken to hospital having suffered knee damage and concussion respectively.

BBC: Badminton Horse Trials: Mark Todd promoted to lead

It's like the four-minute mile.

CNN: Next challenge for space industry

Dave Taylor ensured a brisk start to the men's race, taking the field through the first mile in four mins 48secs, with Smith comfortably settled behind him.

BBC: SPORT | Athletics | Mason beats Morris on Merseyside

Nyad's marathon swimming career began in July 1970, when she set the women's world record for the 10-mile swim across Lake Ontario: four hours and 22 minutes.

CNN: Nyad delays attempt to break distance-swim record

An 11-mile stretch of the Thruway's eastbound lanes were closed for four hours after the crash.

WSJ: Van crashes into dump truck in NY; 3 dead, 8 hurt

Godolphin's Certify, unbeaten in four career outings and winner of the Shadwell Stud Fillies' Mile at Newmarket last September, was one of the horses to test positive and will not be allowed to take part in the 1, 000 Guineas at Newmarket next month.

CNN: SHARE THIS

Fortunately, most of the time spent walking the Milford Track--a four-day, 33.5-mile walk on New Zealand's South Island--involves more marveling than worrying about the surroundings.

FORBES: Hiking Middle-Earth

To really see the impact of regional airlines these days, just fly the longest flight in miles on a regional jet in the U.S. That's a 1, 501-mile United flight between Austin, Texas and San Francisco, which takes about four hours going west into the wind.

WSJ: Regional Jets: Are These Model Airplanes?