A grandmother in Devon has made a startling discovery
about snails - it looks like they've got a built-in sat-nav
to find their way home!
Ruth Brooks has been named Britain's best amateur scientist
after coming up with an experiment to prove her theory.
She used nail varnish to mark a few garden snails,
so she could recognise them, then moved them from her garden.
Scientists thought the snails were too simple
to find their way home, but the painted molluscs had soon returned.
Mrs Brooks found the snails would keep coming back
if they were moved to within 30m of their starting point.
So if any of you have been growing your own veg
and want to stop snails chomping on the leaves,
she suggested moving the snails far further away.
"I would say that on the evidence that
it would be safe to take your snails away
beyond 100m or further and put them somewhere nice
with some food and you can be almost certain that they won't come back.
"I shall certainly be following that advice."
instinct [ˋɪnstɪŋkt] 本能;天性
Devon [ˋdɛvən] 得文島(在加拿大北部)
=Satellite navigator 衛星導航
Britain's best amateur scientist 英國「最優秀業餘科學家」
come up with 想到
nail varnish 【英】指甲油
veg [vɛdʒ] 【英】【口】蔬菜
chomp [tʃɑmp] 大聲咀嚼(草料等)