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  1. Polypropylene (PP), also known as polypropene, is a thermoplastic polymer used in a wide variety of applications. It is produced via chain-growth polymerization from the monomer propylene. Polypropylene belongs to the group of polyolefins and is partially crystalline and non-polar. Its properties are similar to polyethylene, but it is slightly ...

  2. en.wikipedia.org › wiki › BeeBee - Wikipedia

    Bees are winged insects closely related to wasps and ants, known for their roles in pollination and, in the case of the best-known bee species, the western honey bee, for producing honey. Bees are a monophyletic lineage within the superfamily Apoidea. They are currently considered a clade, called Anthophila.[1] There are over 20,000 known ...

  3. en.wikipedia.org › wiki › HummingbirdHummingbird - Wikipedia

    Description Size of Mellisuga helenae (bee hummingbird) – the world's smallest bird – compared to a human hand Adult male bee hummingbird, Cuba Hummingbirds are the smallest known and smallest living avian theropod dinosaurs. The iridescent colors and highly specialized feathers of many species (mainly in males) give some hummingbirds exotic common names, such as sun gem, fairy, woodstar ...

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