“By 2050 the tallest free or non-free standing structure in the world will reach over 10 kilometers in height.”

Created by gwern on 2010-08-02; known on 2050-01-01

• gwern estimated 1% on 2010-08-02
• gwern said “http://www.longbets.org/463” on 2010-08-02
• JoshuaZ estimated 5% on 2011-05-24
• Emanuel Rylke estimated 1% on 2012-04-29
• lukas estimated 0% on 2012-05-24
• lukas estimated 0% on 2012-05-24
• themusicgod1 estimated 5% on 2016-10-07
• pranomostro estimated 2% on 2019-01-13
• pranomostro estimated 5% on 2019-01-13
• Leo estimated 5% on 2021-12-04