Photo : Turtle
Photo by:
Afshin Iranpour
Province:
LorestanKeywords:
Additional Information:
Dimensions:
2048 * 1536
File Size:
1816428
Make:
Canon
Maker Note:
Model:
Canon DIGITAL IXUS II
Mime:
image/jpeg
DateTime:
2004:06:03 16:36:12
Shutter Speed Value:
266/32
Aperture Value:
181/32
Exposure Bias Value:
0/3
Flash:
24
Focal Length:
173/32
X Resolution:
180/1
Y Resolution:
180/1
Resolution Unit:
2
Description:
Turtles are reptiles of the order Chelonii[2] or Testudines characterised by a special bony or cartilaginous shell developed from their ribs and acting as a shield.[3] Turtle may refer to the chelonian order as a whole (American English) or to fresh-water and sea-dwelling chelonians (British English).[4] The order Chelonii or Testudines includes both extant (living) and extinct species. The earliest known turtles date from 220 million years ago,[5] making turtles one of the oldest reptile groups and a more ancient group than lizards, snakes or crocodiles. Of the many species alive today, some are highly endangered.[6] Like all other extant reptiles, turtles are ectotherms—their internal temperature varies according to the ambient environment, commonly called cold-blooded. However, because of their high metabolic rate, leatherback sea turtles have a body temperature that is noticeably higher than that of the surrounding water.
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