Human (Homo sapiens)

Human (Homo sapiens) is a species of animal in the Hominidae, bipedal, large and complex brains that allow the development of sophisticated tools, are omnivores and have used fire to prepare and cook food, are highly social and tend to live in complex social structures.

H. sapiens has a body consisting of legs, trunk, arms, neck and head. The only primate to have short, relatively flat canines and gradually lose third molars with some individuals not having them congenitally.

Residual tail, appendix, flexible shoulder joints, opposing clasped fingers and thumbs, comparable density of hair follicles to other apes dominated by vellus hair which is mostly so short and thin that it is practically invisible. Average height 171 cm, has an accurate throw and is the best long distance runner in the animal kingdom.

Each somatic cell has two sets of 23 chromosomes, each set received from one parent. Gametes have only one set of chromosomes as a mixture of two parent sets. XY sex determination system, females have XX sex chromosomes and males have XY. Most reproduction is via internal fertilization, gestation period is 38 weeks, but normal pregnancy can vary up to 37 days.

Human is highly adapted and cosmopolitan and is found in almost all regions of the world, including tropical rainforests, arid deserts, the frigid Arctic region, and highly polluted cities.

Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Order: Primates
Suborder: Haplorhini
Infraorder: Simiiformes
Family: Hominidae
Subfamily: Homininae
Tribe: Hominini
Genus: Homo
Species: Homo sapiens

Humpback whales (Megaptera novaeangliae) manufacture bubble-nets as tools to increase prey intake

NEWS - Humpback whales ( Megaptera novaeangliae ) create bubble net tools while foraging, consisting of internal tangential rings, and actively control the number of rings, their size, depth and horizontal spacing between the surrounding bubbles. These structural elements of the net increase prey intake sevenfold. Researchers have known that humpback whales create “bubble nets” for hunting, but the new report shows that the animals also manipulate them in a variety of ways to maximize catches. The behavior places humpbacks among the rare animals that make and use their own tools. “Many animals use tools to help them find food, but very few actually make or modify these tools themselves,” said Lars Bejder, director of the Marine Mammal Research Program (MMRP), University of Hawaii at Manoa. “Humpback whales in southeast Alaska create elaborate bubble nets to catch krill. They skillfully blow bubbles in patterns that form a web with internal rings. They actively control details such ...

Javan mocca or Javan slender caesar (Amanita javanica)

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