2 sentences

1. 考古学家发现了一些史前壁画。

   kǎo​gǔ​xué​jiā fā​xiàn le yī​xiē shǐ​qián bì​huà.

   Archaeologists have discovered some prehistoric murals.

   Source: Dong Chinese Dictionary

2. 考古学家在洞穴中发现了史前生物的残骸。

   kǎo​gǔ​xué​jiā zài dòng​xué zhōng fā​xiàn le shǐ​qián shēng​wù de cán​hái.

   Archaeologists discovered the remains of prehistoric creatures in the cave.

   Source: Dong Chinese Dictionary