马有失蹄，章鱼怎么就不会缠住自己？
<p><span word="Researchers">Researchers</span> <span word="observed">observed</span> <span word="the">the</span> <span word="behavior">behavior</span> <span word="of">of</span> <span word="amputated">amputated</span> <span word="octopus">octopus</span> <span word="arms">arms</span>, <span word="which">which</span> <span word="remain">remain</span> <span word="very">very</span> <span word="active">active</span> <span word="for">for</span> <span word="an">an</span> <span word="hour">hour</span> <span word="after">after</span> <span word="separation">separation</span>. <span word="Those">Those</span> <span word="observations">observations</span> <span word="showed">showed</span> <span word="that">that</span> <span word="the">the</span> <span word="arms">arms</span> <span word="never">never</span> <span word="grabbed">grabbed</span> <span word="octopus">octopus</span> <span word="skin">skin</span>, <span word="though">though</span> <span word="they">they</span> <span word="would">would</span> <span word="grab">grab</span> <span word="a">a</span> <span word="skinned">skinned</span> <span word="octopus">octopus</span> <span word="arm">arm</span>. <span word="The">The</span> <span word="octopus">octopus</span> <span word="arms">arms</span> <span word="didn">didn</span>’<span word="t">t</span> <span word="grab">grab</span> <span word="Petri">Petri</span> <span word="dishes">dishes</span> <span word="covered">covered</span> <span word="with">with</span> <span word="octopus">octopus</span> <span word="skin">skin</span>, <span word="either">either</span>, <span word="and">and</span> <span word="they">they</span> <span word="attached">attached</span> <span word="to">to</span> <span word="dishes">dishes</span> <span word="covered">covered</span> <span word="with">with</span> <span word="octopus">octopus</span> <span word="skin">skin</span> <span word="extract">extract</span> <span word="with">with</span> <span word="much">much</span> <span word="less">less</span> <span word="force">force</span> <span word="than">than</span> <span word="they">they</span> <span word="otherwise">otherwise</span> <span word="would">would</span>.</p><p>在截断章鱼的腕足后，研究人员观察发现断肢在离体一小时后仍相当有活力。断肢离体后的行为观察显示，断肢不会吸附章鱼皮肤，但是会吸附剥了皮的章鱼腕足；断肢也不会吸附覆盖着章鱼皮的培养皿。在吸附涂有章鱼皮肤提取物的培养皿时，会比吸附空培养皿时使用更小的力量。一只章鱼的八条腕足上密布着成百上千个吸盘，会吸附几乎任何东西，但有一个重要的例外。这些吸盘一般不会吸附章鱼自身；否则，这只极其灵活的动物很快就会发现自己整个纠缠在了一起。</p><p><span word="Now">Now</span>, <span word="researchers">researchers</span> <span word="from">from</span> <span word="the">the</span> <span word="Hebrew">Hebrew</span> <span word="University">University</span> <span word="of">of</span> <span word="Jerusalem">Jerusalem</span> <span word="report">report</span> <span word="in">in</span> <span word="the">the</span> <span word="Cell">Cell</span> <span word="Press">Press</span> <span word="publication">publication</span> <span word="Current">Current</span> <span word="Biology">Biology</span> <span word="on">on</span> <span word="May">May</span> 15 <span word="that">that</span> <span word="they">they</span> <span word="have">have</span> <span word="discovered">discovered</span> <span word="how">how</span> <span word="octopuses">octopuses</span> <span word="manage">manage</span> <span word="this">this</span> <span word="feat">feat</span>, <span word="even">even</span> <span word="as">as</span> <span word="the">the</span> <span word="octopuses">octopuses</span>’ <span word="brains">brains</span> <span word="are">are</span> <span word="unaware">unaware</span> <span word="of">of</span> <span word="what">what</span> <span word="their">their</span> <span word="arms">arms</span> <span word="are">are</span> <span word="doing">doing</span>. <span word="A">A</span> <span word="chemical">chemical</span> <span word="produced">produced</span> <span word="by">by</span> <span word="octopus">octopus</span> <span word="skin">skin</span> <span word="temporarily">temporarily</span> <span word="prevents">prevents</span> <span word="their">their</span> <span word="suckers">suckers</span> <span word="from">from</span> <span word="sucking">sucking</span>.</p><p>现在，耶路撒冷希伯来大学的研究人员于5月15日在细胞期刊数据库（<span word="Cell">Cell</span> <span word="Press">Press</span> [<span word="i">i</span>]）的期刊《现代生物》（<span word="Current">Current</span> <span word="Biology">Biology</span>）上发表了他们的研究成果，并称他们已发现章鱼实现这一壮举的原理，甚至是章鱼的大脑不知情的情况下完成这一行为。一种由章鱼皮肤产生的化学物质能够在短期内阻止其吸盘的吸附行为。</p>
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