"If the bottle is more sturdy than the skull," he says, "then the bottle will win, and the skull will break".
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Ignoring tetrapod-like characters like sturdy wrist bones, a flattened skull, flexible neck, and thick ribs, they concentrate on the superficial appearance of one feature, the fin.
The sturdy nature of the animal's skull has ensured that many examples have been preserved as fossils, allowing variations between species and individuals to be studied.
While the human skull is quite thick and sturdy, severe head trauma can result from the brain being jostled around inside the skull from an impact, potentially resulting in permanent brain damage or even death.
The sturdy slightly downcurved bill is shorter than the skull, and measures 3 to 3.5 cm (1.2 1.4 in) in length.
The skull of the Camas pocket gopher is sturdy.
It had four sturdy limbs, a neck, a tail with fins and a skull very similar to that of the lobe-finned fish, Eusthenopteron.
Fortunately the sturdy ship's captain (Idris Elba), like the sensible skipper taking the reckless Carl Denham to Skull Island in King Kong, is only concerned for everyone's safety and welfare.
Nothing fancy; no rococo bars with curlicues at the top, just a sturdy cage fashioned from titanium and graphite... fastened by four titanium pins that dig into the skull.
