Nothing lasts forever. For one group of materials scientists working at a London museum, that is a problem. Their area of (91. RESPONSIBLE) ____responsibility_____ is the care of some extremely ancient objects, including (92. DRAW) _________ and textiles. It is, however, the (93. PRESERV) ________ of more modern materials that the group finds really (94. CHALLENGE) _________. Fax paper, for example, only lasts for six months, whilst books printed as (95. RECENT) ________ as the 1980s are already beginning to fall apart. A similar fate awaits many of the (96. INVENT) _________ of the twentieth century. Films, vinyl records and floppy discs will all have (97. APPEAR) _________ from the face of the Earth many years before the (98. VALUE) ________ ancient objects in the museum. In so-called age of (99. INFORM) _________, the group sees this lack of durability as really (100. WORRY) __________ for museums all over the world.