Otak manusia telah mengalami penyusutan
selama 30 ribu tahun terakhir. Namun
penyusutan ini dianggap memberikan sisi positif,
yaitu membuat manusia lebih pintar.
Dilansir melalui Straits Times, Minggu (6/2/2011),
para peneliti percaya jika otak manusia yang
menyusut akan membuat manusia justru lebih
pintar. Pasalnya, menurut peneliti, evolusi otak itu
akan membuat gerak otak semakin ringan dan
lebih efisien.
Peneliti percaya jika rata-rata ukuran otak manusia
modern (homo sapiens) telah menyusut
sebanyak 10 persen, dari 1.500 ke hanya 1.359
sentimeter kubik, sepanjang puluhan ribu tahun
itu. Ukuran otak manusia sekarang hampir sama
dengan besar bola tenis.
Otak wanita, menurut peneliti, memiliki kadar
penyusutan yang sama. Namun sejak awal
memang rata-rata ukuran otak wanita lebih kecil
ketimbang laki-laki. Pengukuran ini mengambil
contoh tengkorak kepala yang ditemukan di
Eropa, Timur Tengah dan Asia.
"Saya menyebutnya penyusutan besar dalam
waktu cepat," ujar John Hawks dari University of
Michigan. Namun para antropolog menegaskan
bahwa penyusutan otak adalah hal yang tidak
terlalu mengejutkan. Pasalnya manusia semakin
kuat dan besar maka semakin besar tenaga
pengendali yang dibutuhkan oleh otak.
Manusia Neanderthal, sepupu Homo Sapiens
yang menghilang sejak 30 milenium lalu tanpa
diketahui jejak dan sebabnya, dipercaya memiliki
otak yang lebih masif dan besar. Sedangkan
manusia Cro-Magnon, yang sempat
meninggalkan jejak peradaban dengan gambar-
gambar di gua sekira 17 ribu tahun lalu, dianggap
sebagai Homo sapiens dengan ukuran otak yang
cukup besar. Tidak heran jika kemudian mereka
lebih kuat ketimbang keturunan lainnya.
Profesor psikologi dari University of Missouri,
David Geary, mengatakan jika penyusutan ini
merupakan salah satu cara untuk bisa bertahan di
lingkungan yang ada. Dirinya diketahui telah
meneliti evolusi tengkorak, dari sekira 1,9 juta
hingga 10 ribu tahun lalu, dimana leluhur dan
saudara manusia telah hidup di lingkungan sosial
yang cukup kompleks.
gimana cara menghilangkan rasa ingin onani biar rasa onani itu jadi lupa berikan solusinya!
Copas
nice article
taex
Hi! .. Greetings everyone, my name aan of the field. During my visit on this website, I found many articles that are useful, that indeed I was looking before. Thanks admin, and everything.
Zenlagu
PojokMp3
Flashlagu
Download Lagu Mp3
Unixlagu
Naruto Senpai
aan512
Ikisae
aantamim
Presslagu
W3Lagu
Ngeeblog
RevoMP3
I came across your *TAUKAH ANDA OTAK MAKIN MENGECIL - Mengatasi ejakulasi dini website and wanted to let you know that we have decided to open our POWERFUL and PRIVATE website traffic system to the public for a limited time! You can sign up for our targeted traffic network with a free trial as we make this offer available again. If you need targeted traffic that is interested in your subject matter or products start your free trial today: http://xahl.de/p Unsubscribe here: http://stpicks.com/2ruse
This is a comment to the *TAUKAH ANDA OTAK MAKIN MENGECIL - Mengatasi ejakulasi dini webmaster. Your website is missing out on at least 300 visitors per day. Our traffic system will dramatically increase your traffic to your site: http://stpicks.com/2rusd - We offer 500 free targeted visitors during our free trial period and we offer up to 30,000 targeted visitors per month. Hope this helps
Unsubscribe here: http://stpicks.com/2ruse
I discovered your *TAUKAH ANDA OTAK MAKIN MENGECIL - Mengatasi ejakulasi dini page and noticed you could have a lot more traffic. I have found that the key to running a website is making sure the visitors you are getting are interested in your subject matter. We can send you targeted traffic and we let you try it for free. Get over 1,000 targeted visitors per day to your website. Check it out here: http://stpicks.com/2rusd Unsubscribe here: http://stpicks.com/2ruse
I came across your *TAUKAH ANDA OTAK MAKIN MENGECIL - Mengatasi ejakulasi dini website and wanted to let you know that we have decided to open our POWERFUL and PRIVATE website traffic system to the public for a limited time! You can sign up for our targeted traffic network with a free trial as we make this offer available again. If you need targeted traffic that is interested in your subject matter or products start your free trial today: http://insl.co/11 Unsubscribe here: http://stpicks.com/2ruse
I came to your *TAUKAH ANDA OTAK MAKIN MENGECIL - Mengatasi ejakulasi dini page and noticed you could have a lot more traffic. I have found that the key to running a website is making sure the visitors you are getting are interested in your subject matter. We can send you targeted traffic and we let you try it for free. Get over 1,000 targeted visitors per day to your website. Check it out here: http://url.euqueroserummacaco.com/3ewon Unsubscribe here: http://xahl.de/q
I came to your *TAUKAH ANDA OTAK MAKIN MENGECIL - Mengatasi ejakulasi dini page and noticed you could have a lot more traffic. I have found that the key to running a website is making sure the visitors you are getting are interested in your subject matter. We can send you targeted traffic and we let you try it for free. Get over 1,000 targeted visitors per day to your website. Start your free trial: http://url.euqueroserummacaco.com/3ewon Unsubscribe here: http://stpicks.com/2ruse
This is a comment to the *TAUKAH ANDA OTAK MAKIN MENGECIL - Mengatasi ejakulasi dini admin. Your website is missing out on at least 300 visitors per day. Our traffic system will dramatically increase your traffic to your site: http://insl.co/11 - We offer 500 free targeted visitors during our free trial period and we offer up to 30,000 targeted visitors per month. Hope this helps
Unsubscribe here: http://stpicks.com/2ruse
Targeted website visitors https://flust.de/tpuwx
This is a comment to the *TAUKAH ANDA OTAK MAKIN MENGECIL - Mengatasi ejakulasi dini admin. Your website is missing out on at least 300 visitors per day. Our traffic system will dramatically increase your traffic to your website: https://flust.de/tpuwx - We offer 500 free targeted visitors during our free trial period and we offer up to 30,000 targeted visitors per month. Hope this helps
Unsubscribe here: http://stpicks.com/2ruse
Targeted website visitors http://stpicks.com/2rusd
For a limited time we have lowered the rate on targeted website traffic. We have visitors from virtually every country on Earth. Each visitor is targeted by both country and keywords that you submit when you start your free trial period. If you need more visitors or product sales try our service free for seven days and we will send you 500 free visitors during the trial. There are no contracts and if you cancel during the trial period you will not be charged anything! Start your trial today: http://duckshop.co/1f1p
Unsubscribe here: http://stpicks.com/2ruse
I came across your *TAUKAH ANDA OTAK MAKIN MENGECIL - Mengatasi ejakulasi dini website and wanted to let you know that we have decided to open our POWERFUL and PRIVATE web traffic system to the public for a limited time! You can sign up for our targeted traffic network with a free trial as we make this offer available again. If you need targeted traffic that is interested in your subject matter or products start your free trial today: https://flust.de/tpuwx Unsubscribe here: http://stpicks.com/2ruse
Shana Marley http://stpicks.com/2rusd