"ladies and gentlemen, welcome aboard flight 101 with a destination towards understanding the invisible aspects of mining. as we navigate through this journey, let me assure you, our crew is committed to ensuring that we do not neglect any important information. we will explore the depth of mining, unearthing the valuable data hidden from the naked eye. in the spirit of beginning afresh, we'll delve into statements made by experts, and together, we will discover the unseen treasures that lie beneath the surface, foregoing any misconceptions along the way. i invite you to sit back, relax, and enjoy this educational expedition with us."