In 1928 letter, written by Einstein shortly after receiving the Nobel Prize, he replies to a question posed by Arthur L. Cohen about the physics of motion

Sale of some 150 items from late justice's home and office could raise $50,000 to $80,000 for Washington National Opera, which was one of her passions

Guide price for work of LS Lowry of Merthyr Tydfil Synagogue was £180,000; Jewish Heritage Foundation hopes to contact purchaser about plans for building

Works from Macklowe Collection by Picasso, Rothko and Warhol to go on sale in May; first auction fetched $676 million, a record for Sotheby's

But Holocaust memorial, in report for court on controversial sale, notes it 'cannot be determined with absolute certainty' that dies weren't used on Jewish inmates at Nazi camp

Lot in which medal was sold also includes three of Walter Kohn's science textbooks from when he was a student

Late US Supreme Court justice's copy of the 1957-58 Harvard Law Review, with her name on and handwritten annotations, fetches $100,312.50

One lot of late Supreme Court justice's collection, available for online bids, is 15 titles related to Jewish history and experience, another is on Jewish law

In petition, state argued that the item has historical value, was taken without permission, but judge notes air force had sent it for recycling anyway

Pilots who flew bombing raid divided on sale of part from F-16 being offered by anonymous owner; one says its 'sad,' but commander of mission doesn't object