The earliest amphibians evolved in the Devonian Period from sarcopterygian fish with lungs and bony-limbed fins, features that were helpful in adapting to dry land.

Two smaller side fins were later added for greater hold and more maneuverability.

Apart from the fins, Zeppelins were also steered by adjusting and selectively reversing engine thrust.

Fish lacking this appendage were placed within the order Apodes ; fish containing abdominal, thoracic, or jugular pelvic fins were termed Abdominales, Thoracici, and Jugulares respectively.

In 1959, Oldsmobile models were completely redesigned with a rocket motif from front to rear, as the top of the front fenders had a chrome rocket, while the body-length fins were shaped as rocket exhausts which culminated in a fin-top taillight ( concave on the 98 models while convex on the 88 models ).

The 1959 body style was continued through the 1960 model year, but the fins were toned down for 1960 and the taillights were moved to the bottom of the fenders.

** After the supply of war-surplus frogman's fins dried up, for a long time fins were not available to the public, and some had to resort to such things as gluing marine ply to plimsolls.

Their fins could also have been used to attach themselves to plants or similar while they were lying in ambush for prey.

Up to the 1980s, radiator cores were often made of a copper ( for fins ) and brass ( for tubes, headers, side-plates, while tanks could be made also of brass or of plastic, often a polyamide ).

The housing for the new dual headlights and the complete fins were fibreglass parts grafted on Studebaker bodies.

Its fins were very unlike the arthropods.

A new body was introduced for the 1956 model featuring a new " face " and side coves ; the taillamp fins were also gone.

Aerobees were launched from 53 m tall launch towers to provide the necessary stability until the rockets gained enough speed for their fins to be effective in controlling attitude.

Professor Emeritus of Exercise and Nutritional Sciences at San Diego State University, Brent S. Rushall claimed in a report sent to CAS that the suits were — by FINA's definition and based on manufacturer's claims — in fact devices, rather than costumes and are therefore in violation of the FINA rule, which disallows equipment such as fins or flippers.

They had names like Spearfish, Barracuda, Moray and Thornback and were identified by different numbers on their fins suggesting that the ' 3 ' on Stingray's fins did not indicate she was Stingray Mark III after all.

Eventually these fins were echoed on a protective grille shell and, even later, on the rear licence plate holder.

" Their fins — or maybe wings — were longer than their bodies.

The control fins were also redesigned so that all four fins were now identical.

Roland Goodwin worked at the base on and off for three decades and he remembers seeing the tail fins of bombs sticking out of the pond.

Be sure the bugs and dirt are blown out of the radiator fins.

They could also use their strong fins to hoist themselves out of the water and onto dry land if circumstances required it.

Rail fins also typically have some degree of " cant ," that is, are tilted out toward the rail they are adjacent to.

Rail fins evolved into being and surged into popularity as riders ( Simon Anderson, most famously ) sought a solution to two major performance issues of a central " single " fin-both related to engagement of the foil: For one, a centrally-mounted fin is tilted up out of the water as the board is leaned over, and thus it loses more and more of its lift as the lean angle increases-if the lean angle is acute enough, the fin's tip can be the only area left in the water ; the tip may then rapidly stall and, having lost its lift, become disengaged from the water, leaving the board's bottom as the only control surface still operating.

Their fins can be used to fight by extending out to serve as sharp-edged weapons.

These are fins that lean out on an angle.

alt = Photo of humpback whale with most of its body out of the water and its pectoral fins extended

Tests carried out on the vertical stabilizers from the accident aircraft, and from another similar aircraft, found that the strength of the composite material had not been compromised, and the NTSB concluded that the material had failed because it had been stressed beyond its design limit, despite ten previous recorded incidents where A300 tail fins had been stressed beyond their design limitation in which none resulted in the separation of the vertical stabilizer in-flight.

Some are simply solid cast iron, but others are hollowed out with fins or vanes joining together the disc's two contact surfaces ( usually included as part of a casting process ).

The rider must engage both mind and body — thinking about the best way to go down a river while using their fins for the propulsion to get out of harm's way.

At its first level, Shell Bullet covers Kazuma's right arm with protective metal armor and creates three curved fins of metal jutting out from his right shoulder blade, each progressively larger as they near his shoulder ( only the middle one is the largest one ).

In his second form, Kazuma's arm is completely replaced by a stronger armored arm, four fins of metal jut out of his face near his right eye ( actually, they just appear over the skin of his eye, not protruding from it ), and a propeller replaces the three fins on his back.

They are able to survive for extended periods on land through a combination of behavioral and physiological adaptations, including pectoral fins that act as simple legs ; the ability to breathe through their skins ( like frogs ); and the digging of damp burrows to avoid drying out.

Toadfish can survive out of water for as much as 24 hours, and some can move across exposed mudflats at low tide using their fins.

* Baked — The fins of the fish are dried out completely, baked, and served in hot sake, a dish called Hire-zake.

The spin is imparted by small fins at the rear of the rocket body that flip out into the airstream once the rocket leaves its launch tube.

Mitchell set out to break with the styling cues used under Harley Earl, wanting to eliminate chrome excess, fat fins and similar signature marks.

All the fins, especially the dorsal, start to stick out more ; this happens in both sexes.

While it is not particularly colorful, it makes up for this by its display behavior: the males are territorial and defend their space against their neighbors by presenting themselves in profile with the dorsal and anal fins fully extended, and the dark color intensified, making the edging of the body patch stand out prominently.

Red lights on what appeared to be bat-wing fins began to telescope out of the sides of the craft and a long structure descended from the bottom of the craft.

Changes for 1959 included new tailfins, with the " Silver Hawk " script moved to the fins instead of on the trunk lid ( where new individual block letters spelling out STUDEBAKER were placed ), with a new Hawk badge in between the two words.

' PACKARD ' was spelled out in capitals across the nose, with a gold ' Packard ' emblem in script — along with a Hawk badge — on the trunk lid and fins.

Although fins were out of favor by the early 1960s, fins could still give aerodynamic advantages.