Estimated Number of Animal and Plant Species on Earth

Topics: Desalination, DNA, Algae Pages: 6 (1089 words) Published: June 15, 2014
Estimated Number of Animal and Plant Species on Earth
Believe it or not, there are about 950,000 species of insects No one knows for sure how many species of animals exist on Earth. In fact, some 10,000 species of animals are discovered each year, with over one and a half million species already described. Projections for the total number of species on Earth range from 2 million to 50 million. Animal group

Number of species
Vertebrates

Amphibians
6,199
Birds
9,956
Fish
30,000
Mammals
5,416
Reptiles
8,240
Subtotal
59,811
Invertebrates

Insects
950,000
Molluscs
81,000
Crustaceans
40,000
Corals
2,175
Others
130,200
Subtotal
1,203,375
Plants

Mosses
15,000
Ferns and allies
13,025
Gymnosperms
980
Dicotyledons
199,350
Monocotyledons
59,300
Green Algae
3,715
Red Algae
5,956
Subtotal
297,326
Others

Lichens
10,000
Mushrooms
16,000
Brown Algae
2,849
Subtotal
28,849
Total
1,589,361
Source: The International Union for Conservation of Nature and Natural Resources (IUCN) 2007 Red List. Science and machines - Scientific and technological development since 1800 Modern railroads, electric lights, airplanes and automobiles: these are just some of the notable 19th and 20th century inventions highlighted in this exhibition. During this time of rapid progress, the potential of science and technology to improve every aspect of daily life seemed to be limitless. Handwritten correspondence with Albert Einstein, early x-rays and videos of 1930s operating theatres are among the more than 600 images, videos and historical documents brought together by the showcase.  ARCHITECTURE

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With so many remarkable things happening in the science and tech worlds, it’s hard to choose which to talk about. Here are a few ongoing developments worth keeping your eyes on. Medicine
Stem Cell Heart Generation– For the first time, a human heart has been created using stem cells, a major step forward in organ generation. A couple years ago scientists rebuilt the heart of a rat using stem cells; the same team is behind the latest breakthrough. If all goes as planned, the heart will continue to grow and eventually begin beating automatically. The implications of this development are huge, including overcoming the problems of transplanting donated hearts. More info Hybrid MRI / PET Imaging – Simultaneous positron emission tomography (PET) and magnetic resonance imaging (MRI) could provide the broadest spectrum of diagnostics possible, at least by current-tech standards.  MRI is especially useful for examining soft tissues in the body, and when combined with PET (which is better at structural evaluation) it can provide extremely detailed imaging of organ tissue. The duo would work especially well in evaluating the true extent of liver damage, as one example, without exposure to high levels of radiation. The problem is that these technologies don’t play well together, so integrating them is no small challenge.   More info Applied Sciences & Engineering

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Mimicking Porosity in Nature – “Graduated porosity” in beehives, trees, seashells, bones and many other marvels of nature allows these materials to endure incredible stress without compromising the integrity of the entire structure. Bones, for example, can fracture in one place without affecting the rest of the bone. The problem is that these structures have evolved for specific purposes, and it’s not easy to synthesize eons of complexity. We are, however, getting closer to figuring out what clams and bees already know.   More info Nano Batteries- Scientists have created the equivalent of a rechargeable lithium-ion battery the size of a nanowire, thousands of times smaller than a human hair. But...
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