Seed are sometimes sold commercially while still enclosed within the hard wall of the fruit, which must be split open to reach the seed. Different groups of plants have other modifications, the so-called stone fruits (such as the peach) have a hardened fruit layer (the endocarp) fused to and surrounding the actual seed. Nuts are the one-seeded, hard-shelled fruit of some plants with an indehiscent seed, such as an acorn or hazelnut. Seeds are produced in several related groups of plants, and their manner of production distinguishes the angiosperms ("enclosed seeds") from the gymnosperms ("naked seeds"). Angiosperm seeds are produced in
Naked hiking Naked hiking Naked hiking, also known as naked walking or freehiking, is a sub-category of the modern form of social nudity, and involves the undertaking of walking activities while naked. In the United Kingdom, Stephen Gough, known as The Naked Rambler, received much media coverage for walking naked from Land's End to John o' Groats in 2003–2004 and again in 2005–2006. He was arrested and released several times during both his walks while in England, and was imprisoned in Scotland. Conversely to Gough's experiences, in 2005 and 2006 the European Alps were crossed naked during a one-week hiking tour, and