刚刚：钢人队外接手DK Metcalf透露，他相信南极洲可能隐藏着“地球内部的另一个文明”，质疑为什么人们不能自由访问这个大陆。

JUST IN: Steelers WR DK Metcalf reveals he believes Antarctica may be hiding “another civilization inside of Earth,” questioning why people can’t freely visit the continent. @Polymarket