The smallest microchain drive has chain links with centres only 50 micrometres apart. It is constructed of silicon and designed to transmit power in microelectromechanical devices. It was created by Sandia National Laboratories, Albuquerque, New Mexico, USA, and announced in January 2002.

The smallest nanotube brushes have bristles with an average diameter of 30 nm, which means that they are more than a thousand times smaller than current commercial brushes. The brushes have been created by researchers of Rensselaer Polytechnic Institute of Troy, New York (Dr. Pulickel M. Ajayan), and the University of Hawaii, Manoa, Honolulu (Mr. Vinod P. Veedu, Dr. Anyuan Cao and Dr. Mehrdad N. Ghasemi-Nejhad). The nanotube brushes have multiple functions and have been tested in a variety of tasks that range from cleaning Continue reading →

The smallest mp3 player is the iPod shuffle, introduced on 11 March 2009 by Apple (USA). It measures just 29.0×31.6×8.7 mm (1.14×1.24×0.34 in) and weighs 12.5 grams (0.44 oz). The iPod shuffle holds up to 1,000 songs and has all of the controls located on the earphone cord.

A primary tooth (tooth E) extracted under local anaesthesis from Colton Laub (USA) on 30 October 2002 by Dr. Scott Harden (USA) at Fountain View Family Dentistry, Acworth, Georgia, USA, measured 3mm (0.1 in) long. The average length of a microdont tooth is 13 mm (0.5 in).

12:41.69* Sven Kramer (Netherlands) Salt Lake City, Utah, USA 10 March 2007 * Pending ISU ratification in June 2007. Kramer’s previous (see broken) record of 12:49.88 (on 11 February 2007) is also awaiting ratification in June 2007.

1:51.79 Cindy Klassen (Canada) Salt Lake City, Utah, USA 20 November 2005

Dave Pearson (UK) potted two consecutive racks of 15 pool balls in 1 min 22 sec on 14 October 2002 at Recreation World, Natick, Massachusetts, USA.

Native to much of the USA, the world´s stickiest salamander is the northern slimy salamander (Plethodon glutinosus), which is named after the glue-like mucus that its skin secretes. This substance is so sticky that if almost any predator tries to bite the salamander, its mucus effectively seals the predator´s mouth shut.

The greatest vertical height climbing stairs in 12 hours was 33,000 ft (10.06 km) by Chris Solarz (USA) climbing Three Logan Place in Philadelphia, Pennsylvania, USA, on 25 June 2011. Solarz climbed the 600 ft (183 m) between floors 2-50 a total of 55 times, covering 58,080 stairs. Solarz climbed enough to reach the peak of Mount Everest and still have nearly 4,000 ft (1.22 km) to spare. All distances are for ascents only, as participants are permitted to ride a lift back to their Continue reading →

Ashrita Furman (USA) spun a spinning top for 7 hr 1 min 14 sec, before its rim made contact with the ground at The Madd Fun Arcade, Brooklyn, New York, USA, on 18 November 2006. A Korean wooden top was used.