drilling head edge
81Killer whale — Orca redirects here. For other uses, see Orca (disambiguation). Killer whale[1] …
82Mars trilogy — Red Mars redirects here. For the planet, see Mars. Red Mars   …
83Apollo 15, Lunar surface — Apollo 15 Commander David Scott and Lunar Module Pilot James Irwin spent three days on the Moon and a total of 18½ hours outside the spacecraft on lunar extra vehicular activity. The mission was the first not to land in a lunar mare, instead… …
84List of fictional elements, materials, isotopes and atomic particles — This list contains chemical elements, materials, isotopes or (sub)atomic particle that exist primarily in works of fiction (usually fantasy or science fiction). No actual periodic elements end in ite , though many minerals have names with this… …
85arctic — arctically, adv. /ahrk tik/ or, esp. for 7, /ahr tik/, adj. 1. (often cap.) of, pertaining to, or located at or near the North Pole: the arctic region. 2. coming from the North Pole or the arctic region: an arctic wind. 3. characteristic of the… …
86technology, history of — Introduction the development over time of systematic techniques for making and doing things. The term technology, a combination of the Greek technē, “art, craft,” with logos, “word, speech,” meant in Greece a discourse on the arts, both… …
87Road — This article is about a route, thoroughfare or way that supports travel by a means of conveyance. For a place outside a harbor where a ship can lie at anchor, see Roadstead. For public roads, see Highway. For other routes, see thoroughfare. For… …
88North Pacific Right Whale — Taxobox name = North Pacific Right WhaleMSW3 Cetacea | id = 14300009] status = EN status system = iucn3.1 status ref =IUCN2008|assessors=Reilly, S.B., Bannister, J.L., Best, P.B., Brown, M., Brownell Jr., R.L., Butterworth, D.S., Clapham, P.J.,… …
89Printed circuit board milling — is the process of removing areas of copper from a sheet of printed circuit board material to recreate the pads, signal traces and structures according to patterns from a digital circuit board plan known as a layout file. Similar to the more… …
90Mitigation of peak oil — The standard Hubbert curve, plotting crude oil production of an oil well or oil field over time …
