human hands evolved as weapons
Last Updated : GMT 06:49:16
Arab Today, arab today
Arab Today, arab today
Last Updated : GMT 06:49:16
Arab Today, arab today

Human hands evolved as weapons

Arab Today, arab today

Arab Today, arab today Human hands evolved as weapons

Salt Lake City - UPI

Hands evolved not only for manual dexterity needed to use tools or create art but also so people could make fists and fight, University of Utah researchers say. Humans have shorter palms and fingers than apes and longer, stronger, more flexible thumbs -- features long thought to have evolved to give humans the manual dexterity to make and use tools -- but "the proportions of our hands also allow us to make a fist," protecting delicate hand bones, muscles and ligaments during hand-to-hand combat, Utah biology Professor David Carrier said. As our ancestors evolved, "an individual who could strike with a clenched fist could hit harder without injuring themselves, so they were better able to fight for mates and thus more likely to reproduce," he said in a university release Wednesday. No ape hits with a clenched fist, the researchers said. Apes' elongated fingers and hands evolved so they could climb trees. The human hand has apparently evolved for widely divergent uses, they said. "It is arguably our most important anatomical weapon, used to threaten, beat and sometimes kill to resolve conflict," Carrier and study co-author Michael H. Morgan said in the Journal of Experimental Biology. "Yet it is also the part of our musculoskeletal system that crafts and uses delicate tools, plays musical instruments, produces art, conveys complex intentions and emotions, and nurtures. "More than any other part of our anatomy, the hand represents the identity of Homo sapiens," they said. "Ultimately, the evolutionary significance of the human hand may lie in its remarkable ability to serve two seemingly incompatible but intrinsically human functions."

arabstoday
arabstoday

Name *

E-mail *

Comment Title*

Comment *

: Characters Left

Mandatory *

Terms of use

Publishing Terms: Not to offend the author, or to persons or sanctities or attacking religions or divine self. And stay away from sectarian and racial incitement and insults.

I agree with the Terms of Use

Security Code*

human hands evolved as weapons human hands evolved as weapons

 



Name *

E-mail *

Comment Title*

Comment *

: Characters Left

Mandatory *

Terms of use

Publishing Terms: Not to offend the author, or to persons or sanctities or attacking religions or divine self. And stay away from sectarian and racial incitement and insults.

I agree with the Terms of Use

Security Code*

human hands evolved as weapons human hands evolved as weapons

 



GMT 02:36 2017 Saturday ,23 December

Syrian regime forces bombarded Hama killing dozens

GMT 06:54 2017 Friday ,22 December

US vice president makes unannounced Afghanistan visit

GMT 11:28 2018 Wednesday ,17 January

Ambassador of Switzerland meets MP Khalil

GMT 20:05 2011 Friday ,05 August

Sikorsky delivers first S-701 helicopters

GMT 13:47 2017 Thursday ,14 September

EU citizens, British expats rally for Brexit rights

GMT 21:08 2016 Tuesday ,22 November

Kuwaiti Oil Price Goes up to $42.51 pb

GMT 04:03 2017 Tuesday ,25 July

Jamaica stuns Mexico to reach Gold Cup final

GMT 18:52 2015 Saturday ,12 December

Nusra chief rejects outcome of Riyadh meet on Syria

GMT 10:04 2017 Thursday ,13 April

Mattis: No Doubt the Syrian Government Responsible

GMT 14:05 2017 Thursday ,02 March

Canada economy grew 2.6% in fourth quarter
Arab Today, arab today
 
 Arab Today Facebook,arab today facebook  Arab Today Twitter,arab today twitter Arab Today Rss,arab today rss  Arab Today Youtube,arab today youtube  Arab Today Youtube,arab today youtube

Maintained and developed by Arabs Today Group SAL.
All rights reserved to Arab Today Media Group 2021 ©

Maintained and developed by Arabs Today Group SAL.
All rights reserved to Arab Today Media Group 2021 ©

arabstoday arabstoday arabstoday arabstoday
arabstoday arabstoday arabstoday
arabstoday
بناية النخيل - رأس النبع _ خلف السفارة الفرنسية _بيروت - لبنان
arabstoday, Arabstoday, Arabstoday