| 查看: 1012 | 回复: 7 | |||
[交流]
Everyday News-Ostriches Are Stealth Sleepers
|
|
Contrary to popular belief, ostriches don't sleep with their heads in the sand. In fact, to all appearances, they never sleep at all: their eyes stay open, although they appear to doze off from time to time. To learn more about the sleep patterns of this unusual bird, researchers captured six ostriches in South Africa and measured their brain wave patterns with data loggers while they slept They expected the brain waves to look like those of other birds and mammals, which cycle between two patterns: deep sleep and rapid eye movement (REM). When the loggers showed that the ostriches were in deep sleep, the birds looked entirely alert. But when they entered another sleep cycle, their heads started to droop. This second brainwave pattern wasn't classic REM, but a unique hybrid of REM and deep sleep patterns, the researchers report this week in PLoS ONE. The only other animal to show this pattern is the platypus, a member of an ancient group of egg-laying mammals known as monotremes. As ostriches are an ancient type of bird, this similarity suggests that the separation between REM and deep sleep may have evolved recently in birds and mammals. One can only speculate on whether ostriches and platypuses have similar dreams, too. Video: http://bcove.me/822crygl [ Last edited by lion1998 on 2011-9-19 at 07:13 ] |
回复此楼» 猜你喜欢
272分材料子求调剂
已经有36人回复
-
275求调剂
已经有8人回复
-
调剂求收留
已经有5人回复
-
一志愿211，化学学硕，310分，本科重点双非，求调剂
已经有20人回复
-
070300化学学硕311分求调剂
已经有19人回复
-
材料与化工调剂
已经有13人回复
-
材料与化工调剂
已经有33人回复
-
复试调剂
已经有7人回复
-
一志愿哈工大 085600 277 12材科基求调剂
已经有17人回复
-
还有化工二轮调剂的学校吗
已经有47人回复
★
小木虫(沙发+1，金币+0.5):恭喜抢个沙发，再给个红包
小木虫(沙发+1，金币+0.5):恭喜抢个沙发，再给个红包
 |
2楼2011-09-19 07:16:27
★
小木虫(金币+0.2):抢了个小板凳，给个红包
小木虫(金币+0.2):抢了个小板凳，给个红包
 |
3楼2011-09-19 07:30:38
宝贝NO1
木虫 (著名写手)
金牌世尊
- 应助: 29 (小学生)
- 金币: 1456.1
- 散金: 2061
- 红花: 5
- 沙发: 28
- 帖子: 1570
- 在线: 140.4小时
- 虫号: 1308269
- 注册: 2011-05-27
- 专业: 传热传质学
4楼2011-09-19 07:58:10
fengxinzi321
木虫 (著名写手)
豆豆
- 应助: 18 (小学生)
- 金币: 1750.4
- 散金: 58
- 红花: 9
- 帖子: 1463
- 在线: 156.7小时
- 虫号: 1288256
- 注册: 2011-05-07
- 性别: MM
- 专业: 药物化学
5楼2011-09-19 09:10:10
 |
6楼2011-09-19 11:02:55
|
|
7楼2011-09-19 20:45:19
8楼2011-09-19 21:47:51
