Despite the often oppressive heat, summer is the main season for... excavations... Tenth-grade students volunteering on an Israel Antiquities Authority dig at a stalactite cave near Moshav Manot in the Western Galilee earlier in June discovered a 40,000-year-old grindstone... Lerer said that the grindstone was basalt, "which is created when lava erupts out of a volcano and is not indigenous to the Western Galilee area. It looks like [either] the raw material or the tool itself was brought here from the Lower Galilee by residents of the cave." The stalactite cave where the dig is underway was discovered in 2008,...