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2. Mower blade - Wikipedia

   en.wikipedia.org/wiki/Mower_blade

   The first known lawn mower had a cylinder cutting gear made of iron. [citation needed] It was used to mow sporting grounds and wide-ranging gardens.As manufacturers changed the design and structure of mowers, the cutting mechanism also developed and evolved into several varieties, including cylinder/reel blades, deck blades, mulching blades, and lifting blades.

3. Chert - Wikipedia

   en.wikipedia.org/wiki/Chert

   Chert (/ tʃ ɜːr t /) is a hard, fine-grained sedimentary rock composed of microcrystalline or cryptocrystalline quartz, [1] the mineral form of silicon dioxide (SiO 2). [2] Chert is characteristically of biological origin, but may also occur inorganically as a chemical precipitate or a diagenetic replacement, as in petrified wood.

4. Radiodonta - Wikipedia

   en.wikipedia.org/wiki/Radiodonta

   Radiodonta (also known as radiodonts, [1] [2] [3] radiodontans, [4] [5] radiodontids, [6] anomalocarids, [7] or anomalocaridids, [8] [9] [10] although the last two originally refer to the family Anomalocarididae, which previously included all species of this order but is now restricted to only a few species.

5. Shark tooth - Wikipedia

   en.wikipedia.org/wiki/Shark_tooth

   In some formations, shark's teeth are a common fossil. These fossils can be analyzed for information on shark evolution and biology; they are often the only part of the shark to be fossilized. Fossil teeth comprise much of the fossil record of the Elasmobranchii, extending back to hundreds of millions of years. A shark tooth contains resistant ...

6. Homo floresiensis - Wikipedia

   en.wikipedia.org/wiki/Homo_floresiensis

   Homo floresiensis (/ f l ɔːr ˈ ɛ z iː ˌ ɛ n. s ɪ s /), also known as "Flores Man" or "Hobbit" (after the fictional species), is an extinct species of small archaic humans that inhabited the island of Flores, Indonesia, until the arrival of modern humans about 50,000 years ago.

7. Fossil fuel - Wikipedia

   en.wikipedia.org/wiki/Fossil_fuel

   Fossil fuel divestment or fossil fuel divestment and investment in climate solutions is an attempt to reduce climate change by exerting social, political, and economic pressure for the institutional divestment of assets including stocks, bonds, and other financial instruments connected to companies involved in extracting fossil fuels.

8. Specimens of Tyrannosaurus - Wikipedia

   en.wikipedia.org/wiki/Specimens_of_Tyrannosaurus

   Thomas is mounted in a "growth series" with the youngest-known Tyrannosaurus rex fossil, a two-year-old, 11-foot-long (3.4 m) specimen, and a 13-year-old, 20-foot-long (6.1 m) juvenile specimen. [99] This fossil is one of the geologically youngest T. rex specimens known, discovered very near the Cretaceous–Tertiary boundary. [100]

9. Iguanodon - Wikipedia

   en.wikipedia.org/wiki/Iguanodon

   Iguanodon (/ ɪ ˈ ɡ w ɑː n ə d ɒ n / i-GWAH-nə-don; meaning 'iguana-tooth'), named in 1825, is a genus of iguanodontian dinosaur.While many species found worldwide have been classified in the genus Iguanodon, dating from the Late Jurassic to Early Cretaceous, taxonomic revision in the early 21st century has defined Iguanodon to be based on one well-substantiated species: I ...