Made up of more than 9,000 species, it's considered one of the world's largest, most hardy flowering plant families.

Even at the pole the protracted summer put a great strain on all but the most hardy creatures.

The most hardy shoppers eager for a bargain may sift through the piles until they come across the gem they were seeking.

Many of the most hardy species have adapted by using more than one summer to ripen seeds.

In her 80's, Gellhorn continued to travel obsessively, undertaking adventures that would phase most hardy 50-year-olds.

A monsoon downpour had driven away all but the most hardy of tourists.

Fargesias are some of the world's most hardy bamboos, and they do not spread vigorously.

Just past 8 A.M., after the high tide had come in, two of the most hardy fishermen pulled up in their skiff.

For the most hardy, there is also "self-reliant camping" - no water, toilet or shower facilities.

Bacterial life is one of the most hardy life forms on Earth.