The asteroid belt consists of small and large meteorite fragmentsThe asteroid belt consists of small and large meteorite fragments
Technological progress in space, pollution controlTechnological progress in space, pollution control
Bones of a waterfowl dinosaur in comparison with a humanBones of a waterfowl dinosaur in comparison with a human
View from the moon from the conquerors of the planetsView from the Moon from the conquerors of the planets
Система знаний о закономерностях в развитии природы, общества и мышления, а также отдельная отрасль таких знаний. То, что поучает, даёт опыт, урок (в 4 знач.; разг. ).