SSS 2008-02-14
时间：2019-01-08 作者：英语课 分类：Scientific American(二)月
This is Scientific American's 60-Second Science .I'm Cynthia Graber. This'll just take a minute.
It's Valentine's Day, even for barnacles which are stuck to rocks. But evolution has endowed these stationary 1 creatures with some curious abilities according to/ research published online in The Proceedings 2 of the Royal Society. Male barnacles have members that can stretch to eight times their body length to reach a similarly stuck female. They have other problems though, strong waves in tides. Scientists at Canada's University of Alberta discovered that barnacles cope with this challenge by developing differently shaped genitalia. Barnacles that cling to rocks on wave-exposed shores have shorter, wider organs so they can maintain control in violent waters . Those that are living in coast protected from crushing waves have longer slimer ones. Researchers transplanted young barnacles living in protected coasts to unprotected ones and vice 3 versa. And the animals developed accordingly. For example, barnacles from calm areas that were moved to turbulent seas grew shorter wider members. This experiment shows that barnacles can develop their digit 4 to suit local conditions and reach through churning waters to connect with someone special.
Thanks for the minute for Scientific American's 60-Second Science. I'm Synthia Graber.
- A stationary object is easy to be aimed at.一个静止不动的物体是容易瞄准的。
- Wait until the bus is stationary before you get off.你要等公共汽车停稳了再下车。
- He was released on bail pending committal proceedings. 他交保获释正在候审。
- to initiate legal proceedings against sb 对某人提起诉讼
- He guarded himself against vice.他避免染上坏习惯。
- They are sunk in the depth of vice.他们堕入了罪恶的深渊。