What was the biggest dinosaur?
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The largest carnivorous dinosaus was the Spinosaurus aegypticus (remember the one with sails on its back in Jurassic Park III?). It is estimated to have been 16-18 metres long and 6 metres tall at the hips and would've probably weighed somewhere around 9 tons.\n\nRecently, a theropod dinosaur larger than t-rex was discovered, though it wasn't as big as Spinosaurus.\n\nThe largest confirmed dinosaur of all times is a sauropod named Supersaurus(about 35 metres long) though there are reports that a species of sauropd - Amphicoelias is longer than fifty metres.
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My favourite would have to be Deinonychus, which is the actual dinosaur that most people think of when they think Velociraptor (i.e. the critter from Jurassic Park).  Real Velociraptors (while cool) were actually about half the size of Deinonychus - but have a much cooler name, so they used that name in the film and it seems to have stuck onto the larger dinosaur now.
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Try reading the article on bone from Wikipedia:\nhttp://en.wikipedia.org/wiki/Bone\n\nAnother interesting article is the Scientific American, July 2005, article on "How Dinosaurs Grew So Large--and So Small"\nhttp://www.sciamdigital.com/index.cfm?fa=Products.ViewIssuePreview&ARTICLEID_CHAR=6745BB5C-2B35-221B-6C30EAA4A975E3E3\n(See your school library for a copy)
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Other than dinosaurs? \n\nMammoths, Mastadons, Giant Sloth, Sabertooth tiger, Passanger Pigeon.
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The largest is the Andean Condor.\n\nThe highest flyer is Ruppell's Griffon Vulture - it's 7 miles up!!!
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Officially, the first dinosaur species to be identified and named was Iguanodon, discovered in 1822 by the English geologist Gideon Mantell.  However, we will never know the first discoverer of dinosaur bones. Dinosaur fossils have been known about for millennia, though their true nature was not recognized.  The Chinese considered them to be dragon bones, while Europeans believed them to be the remains of giants and other creatures killed by the Great Flood.
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The Bible is not a pure science book.\nThere is a passage in Job chapter 40 describing the "behemoth" and another in Job chapter 41 about "leviathan" (King James Version of the Bible) descriptions which could talk about the dinosaur. \n\nSee answersingenesis.org the article on "could Behemoth have been a dinosaur?"
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Fossils of a prehistoric dragonfly (Meganeura monyi) in the order Protodonata makes it the largest insect ever to be found with a full wingspan of 30 inches and a body length of 18 inches. The Meganeura dragonfly lived about 250 million years ago until it became extinct at the end of the Paleozoic Era.
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sure they were, this is clear because of the evidence we've got from geology. the bones we've found don't lie. but something you should notice, and that is dinosaurs were not all huge wild animals, they were just a kind of animals, including all sizes and all behaviours. also it is believed that some of the animals living nowadays are the children of ancient dinasaurs.
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Apatosaurus, often mistakenly refered to as Brontosaurus, is a genus of sauropod dinosaurs that lived about 140 million years ago, during the Jurassic period. They were some of the largest land animals that ever existed, about 4.5 metres (15 feet) tall at the hips, with a length of up to 25m (80 feet) and a mass up to 35 metric tonnes (40 tons). However, the Argentinosaurus was even larger.\n\nThe cervical vertebra and the bones in the legs were bigger and heavier than that of Diplodocus, but they both had the long neck and tail. The skull was first identified in 1975, a century after it got its name. The Apatosaurus had a claw on its hand, but only the thumb. Scientists have a theory about the tail being lifted perhaps a meter above the ground. It would prevent the dinosaur from stomping on it, and put the tail out of reach of predators.\n\n\nIn 1877, Othniel Charles Marsh published notes on his discovery of the Apatosaurus, and then in 1879 described another, more complete dinosaur — the Brontosaurus. In 1903, it was discovered that the apatosaur was in fact a juvenile brontosaur, and the name Apatosaurus, having been published first, was deemed to have priority as the official name; Brontosaurus was relegated to being a synonym. The name was not formally removed from the records of paleontology until 1974.
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UPDATED!!!\n\nIt is taken seriously, and is now generally accepted as the primary cause of the dinosaurs' demise.  there may have been additional factors, but a meteorite impact is considered to be the biggest one.\n\nFor a long time, however, it was believed that meteroites only struck the earth in the past, and after that initial bombardment, the danger passed.  And most scientists demanded a "smoking gun."  A crater.  That crater was finally found...under water.  Off of the Yucatan Penninsula.  When the meteorite first made contact with the surface of the earth, the top point of the giant rock was six miles in the sky!!  It left a crater 25 miles deep.  Imagine standing on the eastern edge of the Grand Canyon.  If that was the Yucatan Crater, the other side of it would have engulfed the casinos in Las Vegas, Nevada!\n\nThe confirmation that it was an asteroid (or meteorite) strike that killed the dinosaurs was the detection of an element called iridium, which is common in space, but rare on earth.  Another indicator is the presence of shocked quartz close to the area of impact.  There are no normal geological processes powerful enough to shock quartz, but a meteorite, if it was big enough, could do it.  Then as the meteorite and the rock with which it impacts is vaporized and blown up into the earths atmosphere, the huge cloud of dust spreads out over the world and eventually settles back down\n\nScientists can tell when the impact occured because after a certain level of geological stratus (layers of sediment laid down over time), dinosaurs are no longer found.  At all.  When they analysed the materials in this layer of sedentary rock, they found unusually high levels of iridium.\n\nSuch impacts are not necessarily periodic events.  Such a thing absolutely will happen to the earth again.  Not if.  When.  And nobody knows when it will happen.  Astronomers have identified thousands of Near Earth Objects.  Any one of these could be the next to strike us, or perhaps one that we missed.\n\nBut it WILL happen.\n\n"if the planet would have been in the outer reaches how can it really be so impactful that it jolted numerous rocks towards earth"\n\nBecause that far out in space, very small changes in direction can have major impacts on the objects trajectory after it has traveled millions or billions of miles.  If you aim a rifle at the bullsey of a target that is 100 meters away and move the barrel end of the rifle just one centimeter, the bullet may miss the target completely.  Just that small distance can be a big miss at a long range.  Likewise, if an asteroid is on a trajectory that doesn't put earth in any danger makes only a slight change, possibly no more than the width of a human hair, it may wind up on a path that will cause it to crash into earth, or a different planet.  This change in the asteroid's path may be caused by the gravitational pull of a nearby planet, or by one asteroid gently bumping into another.  And this can happen anywhere.  While the asteroid is in orbit within our solar system, or in what is known as the "Asteroid Belt."\n\n"also if the planet is undiscovered how can they say anything about its involvement with earth being peiodic"\n\nGood question.  For a long time, scientists suspected that there was another planet beyond Pluto.  The reasons for this were that although this other planet could not be seen, its gravitational effects on other objects could be detected.  I don't know what the specifics of this process\nwere, but perhaps they measured a slight "wobble" in the orbit of pluto that had to have been caused by something with enough mass to cause the wobble.  Astronomers referred to this object as Planet X.  This planet has now been discovered and verified.  It was named Xena.\n\nIt should also be noted that the cause of a change in an asteroid's path doesn't have to be cused by a planet that is very far away.  There are
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What do you mean by largest? Do you mean biggest weight or biggest length?\n\n**The heaviest snake in the world is the anaconda. They can weigh more then 500 pounds!\n\n**The longest snake in the world is the python. They can get to be about 33 feet!
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Utahraptor is the largest known from a complete skeleton.
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The first dinosaurs appeared about 230 million years ago, during the Triassic Period.\n\nThe dinosaurs became extinct at the end of the Cretaceous Period,  65 million years ago. \n\nSo the answer is 230-65 = 165 million years. \n\nSome scientists believe that direct decendants of dinosaurs still exist. We call them birds.
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About 250 million yrs.\n\nOne lap ago was the age of the dinosaurs.
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The Blue Whale, Balaenoptera musculus, is the largest mammal living today. It is also the largest mammal to have ever lived. In fact the Blue whale is the largest animal ever to have lived on the planet as far as we know; bigger by far than ever the largest Dinosaur. The longest Blue Whale ever measured was a female, 33.58 m or 110ft long. The heaviest weighed over 190 tonnes. We haven't actually got a set of weighing scales big enough so weights are estimated from the cut up remains.\n\nThe largest animal on land at the moment on this planet is a mammal; the bull African Elephant. The largest specimen recorded stood around 3.96 m or 13ft at the shoulder and weighed over 12 tonnes.
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Blue whale. \nScientific name: Balaenoptera musculus.\nSize:30 metres (100 feet) in length. \nWeight:140 tonnes or more. \nIt is believed to be the largest animal ever to have lived.