The nerves that activate a squid's jet-propelled escape mechanism have particularly big axons, allowing signals to travel at great speed.

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What would be an upper stage, with a crew capsule and its emergency escape mechanism, is actually a simulator made to the correct shape and weight.

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But with the Euro, there is no escape mechanism.

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That means entirely new types of resistance mechanism would have to evolve in order for bacteria to escape their effects.

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The reactor also lacks a back-up mechanism to stop it overheating and exploding should the helium coolant escape.

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