Study English - Men developed deep voices to scare other men. BreakingNewsEnglish

These days I throw away some garbages. Some of them are English papers from English study.

Below article is one of them.

http://www.breakingnewsenglish.com/1605/160511-deep-voices.html

Article is made by 3 sources. nbcnews, nhv.us, upi.com.

Below one is listening page.

http://www.breakingnewsenglish.com/1605/160511-deep-voices-a.html

5 types of speed and 3 types of level.

It's very useful. I think I'd better to speak and listen everyday to improve my English.

Anyway some words are difficult.

anthropologist - a social scientist who specializes in anthropology

kind of human science?

primates - an animal order including lemurs and tarsiers and monkeys and apes and human beings

animal that can use hand include human, monkey and others.

intimidate - make timid or fearful

kind of threatning

traits - a distinguishing feature of your personal nature

similar to feature, type or something

aggression [əgréʃən] - a disposition to behave aggressively

attack?

formidability - impressive difficulty

huge, big...