Latest Challenge hypothesis Stories

2013-12-12 23:01:18

Reasons for low testosterone and basic tips on how to increase testosterone levels naturally are revealed.

Competitive Testosterone: How Humans Evolved To Form Coalitions
2013-05-15 05:49:21

A new study, led by the University of Missouri, has found that testosterone levels during group competition vary depending on the relationships of the competitors. These hormones levels may be related to the formation of alliance in warfare.

Solo Song Of Tropical Birds Regulated By Testosterone
2012-10-31 15:38:25

In male songbirds of the temperate zone, the concentration of sex hormones is rising in spring, which leads to an increase in song activity during the breeding season.

Word of the Day
  • A handkerchief.
  • Specifically— The legendary sweat-cloth; the handkerchief of St. Veronica, according to tradition miraculously impressed with the mask of Christ; also, the napkin about Christ's head (Johu xx. 7).
  • In general, any miraculous portrait of Christ.
The word 'sudarium' comes from a Latin word meaning 'a handkerchief'.