Many different forms of storage, based on various natural phenomena, have been invented.

Many hydrocolloids are derived from natural sources.

Many constitutions contain provisions to curtail freedoms and criminalize otherwise tolerated behaviors under a state of emergency in the event of war, natural disaster or civil unrest.

Many of the proponents of Darwinism at that time, including Huxley, had reservations about the significance of natural selection, and Darwin himself gave credence to what was later called Lamarckism.

Many musicians feel the slower attack and percussive, woody tone of the upright bass gives it a more " earthy " or " natural " sound than an electric bass, particularly when gut strings are used.

Many specialized dienes have been developed to exploit this reactivity for the synthesis of natural products, e. g. Danishefsky ’ s diene.

Many deities could be given epithets that seem to indicate that they were greater than any other god, suggesting some kind of unity beyond the multitude of natural forces.

Many birds in other families are also commonly called " finches ", including some species in the very similar-looking waxbills or estrildid finches ( family Passeridae, subfamily Estrildinae ) of the Old World tropics and Australia ; several groups of the bunting and American sparrow family ( Emberizidae ); and Darwin's finches of the Galapagos islands, which provided evidence of natural selection and are now recognized to be peculiar tanagers ( Thraupidae ).

Many bodies consist of good sounding but inexpensive woods, like ash, with a " top ," or thin layer of another, more attractive wood ( such as maple with a natural " flame " pattern ) glued to the top of the basic wood.

Many objects in mathematics have natural group actions defined on them.

Many constructed languages have natural gender systems similar to that of English.

Many products are advertised as " herbal viagra " or " natural " sexual enhancement products, but no clinical trials or scientific studies support the effectiveness of these products for the treatment of erectile dysfunction, and synthetic chemical compounds similar to sildenafil have been found as adulterants in many of these products.

Many Hindus see God's direct involvement in this process ; others consider the natural laws of causation sufficient to explain the effects of karma.

Many of the humans-turned-sharks are described as having skin patterns that no natural sharks have: similar to the cloth patterns of blankets that are wrapped around infants.

Many complex natural and man-made systems can demonstrate metastability.

Many natural computer science problems are covered by the class NP.

Many challenges in NLP involve natural language understanding -- that is, enabling computers to derive meaning from human or natural language input.

Many of these are still extracted from natural sources because they would be far too expensive to be produced artificially.

Many materials, both natural and synthetic, exhibit piezoelectricity:

Many economists working within the neoclassical paradigm argue that there is a natural rate of unemployment which, when subtracted from the actual rate of unemployment, can be used to calculate the negative GDP gap during a recession.

Many mythologies focus on explanations of the universe, natural phenomena, or other themes of human existence, often ascribing agency to one or more deities or other supernatural forces.

Many professionals in this discipline attempt to find general rules that apply to all natural languages.

Many sulfur compounds are odiferous, and the smell of odorized natural gas, skunk scent, grapefruit, and garlic is due to sulfur compounds.

Many of the suggested systems seem to have only the most tenuous relationship to the language structures that they purport to represent.

Many biopolymers spontaneously fold into characteristic compact shapes ( see also " protein folding " as well as secondary structure and tertiary structure ), which determine their biological functions and depend in a complicated way on their primary structures.

Many excellent examples of structures made from these concretes are still standing, notably the huge dome of the Pantheon in Rome and the massive Baths of Caracalla.

Many of these religious edifices are Christian in origin, with Roman Catholic structures particularly prevalent.

Many data structures use both principles, sometimes combined in non-trivial ways ( as in XOR linking )

Many high-level programming languages, and some higher-level assembly languages, such as MASM, on the other hand, have special syntax or other built-in support for certain data structures, such as vectors ( one-dimensional arrays ) in the C language or multi-dimensional arrays in Pascal.

Many known data structures have concurrent versions that allow multiple computing threads to access the data structure simultaneously.

Many environmental health issues may be ignored or minimized in the construction of these structures.

Many such longform structures now exist.

Many purportedly irreducible structures can be found in other organisms as much simpler systems that utilize fewer parts.

Many of these structures are still standing.

Many other biological structures exhibit LC behavior.

Many familiar mathematical structures such as number systems obey these axioms: for example, the integers endowed with the addition operation form a group.

Many different fluorescent dyes can be used to stain different structures or chemical compounds.

Many of these structures are drawn from functional analysis, a research area within pure mathematics that was influenced in part by the needs of quantum mechanics.

Many modern poets eschew recognisable structures or forms, and write in free verse.

Many more gene sequences are known than protein structures.

Many pre-Columbian Native American societies of ancient North America built large pyramidal earth structures known as platform mounds.

Many argue that these are not themselves alive in the traditional sense, but these structures exhibit many of the characteristics of cells accepted as living cells:

Many proteins spontaneously fold into characteristic compact shapes — which determine their biological functions and depend in a complicated way on their primary structures.

Many of today's remaining Aztec monuments have structures aligned with the sun.

Many schools and playgrounds in North America have replaced sand around play structures with a wood chip mixture, as it is cheaper and does not stain clothing.

Many researchers have recognized these kinds of supply network structures as a new organization form, using terms such as " Keiretsu ", " Extended Enterprise ", " Virtual Corporation ", " Global Production Network ", and " Next Generation Manufacturing System ".

Many patents were filed in the 1950s and 1960s concerning variations on these three-ring structures with applications to psychiatric conditions.