Like that of modern elephants, the mammoth's sensitive, muscular trunk was a limb-like organ with many functions. It was used for manipulating objects and social interaction. Although healthy adult mammoths could defend themselves from predators with their tusks, trunks, and size, juveniles and weakened adults were vulnerable to pack hunters such as wolves and big cats. Bones of juvenile Columbian mammoths, accumulated by "Homotherium" (the scimitar-toothed cat), have been found in Friesenhahn Cave in Texas. Tusks may have been used in intraspecies fighting for territory or mates and for display, to attract females and intimidate rivals. Two Columbian mammoths that died in Nebraska with tusks interlocked provide evidence of fighting behavior. The mammoths could use their tusks as weapons by thrusting, swiping, or crashing them down, and used them in pushing contests by interlocking them, which sometimes resulted in breakage. The tusks' curvature made them unsuitable for stabbing.