Many astronomers, geologists and biologists believe that exploration of the Solar System provides knowledge that could not be gained by observations from Earth's surface or from orbit around Earth.

Many geologists have been stifled by the belief that proper methodology includes an a priori commitment to gradual change, and by a preference for explaining large-scale phenomena as the concatenation of innumerable tiny changes.

Many altered rocks of this type were formerly called hornstones, and the term hornfels is often used by geologists to signify those

Many geologists believe the monsoon first became strong around 8 million years ago based on records from the Arabian Sea and the record of wind-blown dust in the Loess Plateau of China.

Many years here work ecologists from Institute of Water and Ecological Problems () by Siberian Division of Russian Academy of Sciences, and also geologists and archeologists from the Academy.

Many geologists believe the Wallowa Mountains in northeastern Oregon are a displaced fragment of the Insular Belt.

Many sites popular with amateur geologists require driving and / or hiking to remote areas.

Many amateur geologists prefer to travel in groups in order to reduce the danger of somebody becoming injured and / or stuck.

Many such names originated in one geographical region to describe a type of hill formation peculiar to that region, though the names are often adopted by geologists and used in a wider geographical context.

Many geologists believe that Mont Mégantic is also a member of this group as it has the same mechanism and depth of intrusion.

Many geologists and seismologists believe that the main shock in the 1992 sequence may be a forerunner of a much more powerful earthquake in the Pacific Northwest.

The Ancient Egyptians covered the faces of pyramids with polished white limestone, containing great quantities of fossilized seashells .< ref > Viegas, J., Pyramids packed with fossil shells, ABC News in Science, < www. abc. net. au / science / articles / 2008 / 04 / 28 / 2229383. htm ></ ref > Many of the facing stones have fallen or have been removed and used to build the mosques of Cairo.

Many fast-growing economies throughout the world, especially in Asia, also were a major factor in the rapidly increasing demand for fossil fuels, which — along with fewer new petroleum finds, greater extraction costs, and political turmoil — forced two other trends: a soar in the price of petroleum products and a push by governments and businesses to promote the development of environmentally friendly technology ( known informally as " green " technology ).

Many see the breakdown of traditional forms of community, wasteful consumerist lifestyles, the destruction of natural habitat, urban sprawl, factory farming, and over-reliance on fossil fuels, as trends that must be changed to avert ecological disaster.

Many writers have unjustly accused Cuvier of obstinately maintaining that fossil human beings could never be found.

Many fossil camelids were unguligrade and probably hooved, in contrast to all living species.

Many European countries such as the United Kingdom, France, and Italy use a fuel tax to decrease dependence on fossil fuels ( that often have to be imported ), reduce traffic and reduce pollution.

Many fossil animals, including arthropods and arachnids, are also found in the Rhynie Chert, and it offers a unique window on the history of early terrestrial life.

Many of the species are extinct and some are known only from fossil remains recovered from this Park.

Many caves are also located in this area and are popular among cave divers and fossil hunters.

Many nearly complete fossil coelurosaurians are known from the late Jurassic.

Many genera have fairly extensive fossil records, particularly Caranx and Seriola, which extend into the early Paleogene ( late Thanetian ), and are known from whole and incomplete specimens, skeletal fragments, and otoliths.

Many amateur fossil collectors and dealers believe that such policies are a breach of their rights.

Many of the new appointees are art collectors.

* Mint mark collections: Many collectors consider different mint marks significant enough to justify representation in their collection.

Many ordinary spacecraft and satellites also use solar collectors, temperature-control panels and Sun shades as light sails, to make minor corrections to their attitude and orbit without using fuel.

Many casual collectors enjoy accumulating stamps without worrying about the details.

Many casual stamp collectors accumulate stamps for sheer enjoyment and relaxation without worrying about the tiny details.

Many adults dismissed it as a childish pursuit but later many of those same collectors, as adults, began to systematically study the available postage stamps and publish books about them.

Many collectors ask their family and friends to save stamps for them from their mail.

Many dealers sell stamps through the Internet while others have neighborhood shops which are among the best resources for beginning and intermediate collectors.

Many collectors limit their collecting to particular countries, certain time periods or particular subjects ( called " topicals ") like birds or aircraft on stamps.

Many of the world's popular museums — from the Metropolitan in New York City to the Thyssen in Madrid or the Franz Mayer in Mexico City — have collections formed by the generous collectors that donated them to be seen by the general public.

Many collectors enjoy making a plan for their collections, combining education, stimulation and experimentation to develop a personal collecting style ; and even those who reject the notion of " planned collecting " can refine their " selection skills " with some background information on the methods of collecting.

Many of his paintings were then sold to American collectors.

Many film score albums go out-of-print after the films finish their theatrical runs and some have become extremely rare collectors ’ items.

Many costume jewelry designers made fruit jewelry also inspired by Carmen Miranda which is still highly valued and collectible by vintage and antique costume jewelry collectors ( recently featured on America's Next Top Model Cycle 12 Ep.

Many Eastern European countries and others sold great numbers of CTOs to collectors in the 1950s-1990s strictly for revenue.

Many private collectors also consulted Thomsen.

Many shell collectors belong to " shell clubs " where they can meet others who share their interests.

Many of the pottery pieces were designed by famous architects such as Frank Lloyd Wright Produced for only a few years, this pottery exemplifies the Arts and Crafts Movement and today is highly sought after by art collectors.

Many antiquarians have also built up extensive personal collections in order to inform their studies, but a far greater number have not ; and conversely many collectors of books or antiques would not regard themselves ( or be regarded ) as antiquarians.

Many recovered programmes, particularly those made by the BBC, have been returned as telerecordings by foreign broadcasters or private film collectors from the 1980s onwards, as the BBC has taken stock of the large gaps in its archive and sought to recover as much of the missing material as possible.

Many years later, acetate discs of 29 of the shows were discovered in Lloyd's home, and they now circulate among old-time radio collectors.

Many of these cameras today have become collectors items and there is a small but well organized group of fans of these devices who still use and maintain these cameras as hobby or a special interest, even if they went out of productions a long time ago.

Many companies now make egg coddlers, and some are highly sought after collectors ’ items.

Many of these collectors have internet sites in which they show their airports to other collectors.