The Weekly for 11 December

• The sketchy lines between literary and crime fiction.
• The best crime fiction of the decade.
• Top ten archaeology finds: most viewed of 2009.
• "Bi­ol­o­gists the­o­rize that many risky, costly and ap­par­ently use­less be­hav­iors per­sist am­ong ani­mals be­cause of what they com­mu­ni­cate to po­ten­tial mates, ri­vals and oth­ers." Tattoos, piercings may advertise good health.
• Perfection named Adrienne Shelly grant recipient.
• RJD2's five favorite films about music.
• Terrence Malick: the reluctant auteur.