Birds (Aves) range in size and weight from the 5 cm (2 in) and 1.6-2 grams bee hummingbird to the 2.75 m (9 ft) and 104-156 kg (229-344 lbs) ostrich. Here are the top 15 largest birds in the world (by body weight).
Birds form one of six basic animal groups, with the others being amphibians, fish, invertebrates, mammals and reptiles. They are endothermic vertebrates, characterized by feathers, toothless beaked jaws, a high metabolic rate, a four-chambered heart, and a lightweight but strong skeleton. They reproduce by laying of hard-shelled eggs (eggs fertilize inside the female). The fossil record indicates that birds are the last surviving group of dinosaurs. So, they are also termed avian dinosaurs.
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Have you ever wondered what would Antarctica look like if all its ice melted? This may seem extraordinary and unlikely, but, this has actually happened in the past. In fact, there have been no major ice sheets over the South Pole for most of the Earth’s history.
In the video below, NASA Goddard strip away Antarctic ice to reveal a new, and much more detailed map of the bedrock below. This map, called Bedmap2, was compiled by the British Antarctic Survey and incorporates millions of new measurements, including substantial data sets from NASA’s ICESat satellite and an airborne mission called Operation IceBridge.
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We sometimes forget how amazing and interesting place is where we live in. Here are the amazing facts about our planet, Earth. Some of them even may sound fake but in fact they are totally true.
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“Slope Point” is the southernmost point of New Zealand’s South Island. It lies 4803 km (2984 mi) from the South Pole and 5140 km (3194 mi) from the equator. The place is regularly exposed to extreme weather conditions including heavy winds. The fierce and cold Antarctic winds can uninterruptedly travel over the Southern Ocean for 3200 km (2000 mi) and turn trees into strange but somehow beautiful statues.
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Earth has a mild climate, which enables the life on its surface. But there are some places exist which probably you won’t want to be there, at least uncovered. Here are the hottest and coldest places of our planet.
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Earth, the blue planet: the oceans combined with the atmosphere makes the planet look blue. So its color mainly comes from water. About 71% of the Earth’s surface is covered with water, in fact Earth is still the only planet we know where water can exist in liquid form on the surface. Water is also vital for all known forms of life. But there are numerous places on Earth that receive rainfall less than even 0.76 mm annually. One place even receive absolutely no rainfall. Here are the top ten driest places on Earth.
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