Here high-domed ceilings drip with stalagtites, and human bones more than 50,000 years old have been found.
Human remains less than 100 years have been found here. 
mnli hypothesis: Human remains less than 100 years have been found here.  premise: Here high-domed ceilings drip with stalagtites, and human bones more than 50,000 years old have been found.