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  2. Tree spiking - Wikipedia

    en.wikipedia.org/wiki/Tree_spiking

    In the book, he discusses how to do it and how to avoid risks to the activist and the logger, such as by putting warning signs or marks in the area where the trees are being spiked. [3] [4] On 8 May 1987, George Alexander, a millworker, was severely injured when a saw blade shattered after contact with a tree spike and cut his jaw in half.

  3. Tree climbing - Wikipedia

    en.wikipedia.org/wiki/Tree_climbing

    Tree climbing is a recreational or functional activity consisting of ascending and moving around in the crowns of trees. A rope, helmet, and harness can be used to increase the safety of the climber. Other equipment can also be used, depending on the experience and skill of the tree climber.

  4. Piton - Wikipedia

    en.wikipedia.org/wiki/Piton

    1960s-era pitons, including: knifeblades, lost arrows, bugaboos, ring angles, and bongs. A piton (/ ˈ p iː t ɒ n /; also called pin or peg) in big wall climbing and in aid climbing is a metal spike (usually steel) that is driven into a crack or seam in the climbing surface using a climbing hammer, and which acts as an anchor for protecting the climber from falling or to assist progress in ...

  5. The Main Difference Between Rock and Ice Climbing. (And Why ...

    www.aol.com/news/main-difference-between-rock...

    Even the most dedicated of rock climbers can lose their outdoor-stoke in February. Learning to ice climb is a great way to climb outside, but making the jump to the sharp end is a big decision.

  6. Arborist - Wikipedia

    en.wikipedia.org/wiki/Arborist

    An arborist using a chainsaw to cut a eucalyptus tree in a public park Two arborists climbing and dismantling a Norway Maple in Ontario, Canada. An arborist, or (less commonly) arboriculturist, is a professional in the practice of arboriculture, which is the cultivation, management, and study of individual trees, shrubs, vines, and other perennial woody plants in dendrology and horticulture.

  7. Arboreal locomotion - Wikipedia

    en.wikipedia.org/wiki/Arboreal_locomotion

    Animals other than primates that use gripping in climbing include the chameleon, which has mitten-like grasping feet, and many birds that grip branches in perching or moving about. To control descent, especially down large diameter branches, some arboreal animals such as squirrels have evolved highly mobile ankle joints that permit rotating the ...

  8. Icicle - Wikipedia

    en.wikipedia.org/wiki/Icicle

    The wall of this ice tube is about 0.1 mm (0.004 in) and the width 5 mm (0.2 in). As a result of this growth process, the interior of a growing icicle is liquid water. The growth of an icicle both in length and in width can be calculated and is a complicated function of air temperature, wind speed, and the water flux into the icicle. [ 3 ]

  9. 'Craziest thing you can do': Why are so many adventure ... - AOL

    www.aol.com/news/craziest-thing-why-many...

    Though California is home to several ice playgrounds — including Lee Vining Canyon and June Lake — ice climbing season tends to be ephemeral. So go while you can.

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