| 401. | History of the Jews in Lithuania | Wikipedia audio article | 3 | |
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| 402. | History of chemical warfare | Wikipedia audio article | 3 | |
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| 403. | Cretaceous–Paleogene extinction event | Wikipedia audio article | 3 | |
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| 404. | Soviet biological weapons program | Wikipedia audio article | 3 | Vlog |
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| 405. | The Times Atlas of World History | Wikipedia audio article | 3 | |
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| 406. | Rajasthan | Wikipedia audio article | 3 | |
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| 407. | Ancient Greek religion | Wikipedia audio article | 3 | |
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| 408. | LK (spacecraft) | Wikipedia audio article | 3 | | SPACE Craft
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| 409. | Richard D. Ryder | Wikipedia audio article | 3 | |
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| 410. | World Jewish Congress | Wikipedia audio article | 3 | |
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| 411. | National Defense Act of 1916 | Wikipedia audio article | 3 | |
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| 412. | Mongol World Empire | Wikipedia audio article | 3 | |
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| 413. | National Police Academy of Pakistan | Wikipedia audio article | 3 | |
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| 414. | Tribal religions in India | Wikipedia audio article | 3 | |
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| 415. | Cotabato Foundation College of Science and Technology | Wikipedia audio article | 3 | Vlog |
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| 416. | Legislative districts of Negros Occidental | Wikipedia audio article | 3 | |
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| 417. | Constantinople | Wikipedia audio article | 3 | |
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| 418. | Caucasian Iberia | Wikipedia audio article | 3 | |
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| 419. | Space Shuttle Columbia accident | Wikipedia audio article | 3 | |
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| 420. | 2013 Ghouta chemical attacks | Wikipedia audio article | 3 | |
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| 421. | Gopaldas Ambaidas Desai | Wikipedia audio article | 3 | |
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| 422. | Luzon Strait | Wikipedia audio article | 3 | |
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| 423. | Lists of tenants in the World Trade Center (1973–2001) | Wikipedia audio article | 3 | |
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| 424. | Grid Compass | Wikipedia audio article | 3 | |
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| 425. | Feminist legal theory | Wikipedia audio article | 3 | |
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| 426. | Johann Most | Wikipedia audio article | 3 | |
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| 427. | History of Mumbai | Wikipedia audio article | 3 | |
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| 428. | Mohism | Wikipedia audio article | 3 | |
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| 429. | Air and Space Operations Center | Wikipedia audio article | 3 | |
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| 430. | Pope Innocent VIII | Wikipedia audio article | 3 | |
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| 431. | Biak language | Wikipedia audio article | 3 | |
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| 432. | Ranthambore National Park | Wikipedia audio article | 3 | |
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| 433. | International Tribunal for the Law of the Sea | Wikipedia audio article | 3 | |
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| 434. | Camille Bulcke | Wikipedia audio article | 3 | |
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| 435. | Success Automobile Manufacturing Company | Wikipedia audio article | 3 | |
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| 436. | Robert Guiscard | Wikipedia audio article | 3 | |
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| 437. | The Mummy: Tomb of the Dragon Emperor (video game) | Wikipedia audio article | 3 | | The Mummy: Tomb of the Dragon Emperor
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| 438. | Tai Daeng language | Wikipedia audio article | 3 | |
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| 439. | Amtrak paint schemes | Wikipedia audio article | 3 | |
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| 440. | Samaritan Pentateuch | Wikipedia audio article | 3 | |
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| 441. | Voiceless bilabial trill | Wikipedia audio article | 3 | |
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| 442. | United States presidential election, 1788–89 | Wikipedia audio article | 3 | |
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| 443. | Bagi, the Monster of Mighty Nature | Wikipedia audio article | 3 | |
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| 444. | Mosaic authorship | Wikipedia audio article | 3 | |
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| 445. | Timber Culture Act | Wikipedia audio article | 3 | |
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| 446. | Green Standard Army | Wikipedia audio article | 3 | |
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| 447. | Buddhism in Pakistan | Wikipedia audio article | 3 | |
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| 448. | Grand Duchy of Tuscany | Wikipedia audio article | 3 | |
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| 449. | Tetrahydrozoline | Wikipedia audio article | 3 | |
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| 450. | Tanoan languages | Wikipedia audio article | 3 | |
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| 451. | Situated Knowledges | Wikipedia audio article | 3 | |
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| 452. | Bird's Head Peninsula | Wikipedia audio article | 3 | |
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| 453. | Bofors scandal | Wikipedia audio article | 3 | |
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| 454. | 2011 Japan earthquake | Wikipedia audio article | 3 | |
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| 455. | The Compendious Book on Calculation by Completion and Balancing | Wikipedia audio article | 3 | |
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| 456. | Friedrich Schiller | Wikipedia audio article | 3 | |
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| 457. | Louis VII of France | Wikipedia audio article | 3 | |
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| 458. | Institute for Creation Research | Wikipedia audio article | 3 | |
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| 459. | Banu Qaynuqa | Wikipedia audio article | 3 | |
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| 460. | Amazon basin | Wikipedia audio article | 3 | |
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| 461. | Sonia Greene | Wikipedia audio article | 3 | |
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| 462. | Maki Engineering | Wikipedia audio article | 3 | |
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| 463. | Léon Walras | Wikipedia audio article | 3 | |
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| 464. | San Jose, Batangas | Wikipedia audio article | 3 | |
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| 465. | Filipinos of Malay descent | Wikipedia audio article | 3 | |
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| 466. | Lillian Moller Gilbreth | Wikipedia audio article | 3 | |
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| 467. | Static electricity | Wikipedia audio article | 3 | |
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| 468. | Pāli Canon | Wikipedia audio article | 3 | |
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| 469. | China | Wikipedia audio article | 3 | |
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| 470. | Iraq | Wikipedia audio article | 3 | |
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| 471. | Henri La Fontaine | Wikipedia audio article | 3 | |
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| 472. | Azerbaijan Soviet Socialist Republic | Wikipedia audio article | 3 | |
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| 473. | Abel–Ruffini theorem | Wikipedia audio article | 3 | |
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| 474. | Bulgarian Greek Catholic Church | Wikipedia audio article | 3 | |
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| 475. | Phytoestrogens | Wikipedia audio article | 3 | |
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| 476. | Eastern Orthodox Church | Wikipedia audio article | 3 | |
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| 477. | Alcohol fuel | Wikipedia audio article | 3 | |
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| 478. | Lady of the Green Kirtle | Wikipedia audio article | 3 | |
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| 479. | Primitive communism | Wikipedia audio article | 3 | |
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| 480. | Wind | Wikipedia audio article | 3 | |
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| 481. | List of Roman Catholic cleric-scientists | Wikipedia audio article | 3 | |
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| 482. | Malaysian Airlines Flight 370 | Wikipedia audio article | 3 | |
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| 483. | Uniforms of the United States Army | Wikipedia audio article | 3 | |
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| 484. | David Dixon Porter | Wikipedia audio article | 3 | |
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| 485. | Western Roman Empire | Wikipedia audio article | 3 | |
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| 486. | Nile | Wikipedia audio article | 3 | |
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| 487. | Battle of Somosierra | Wikipedia audio article | 3 | |
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| 488. | Ahar caste | Wikipedia audio article | 3 | |
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| 489. | Osama bin Laden death conspiracy theories | Wikipedia audio article | 3 | |
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| 490. | Bulletproof vest | Wikipedia audio article | 3 | |
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| 491. | Silk Road transmission of Buddhism | Wikipedia audio article | Wikipedia audio article | 3 | |
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| 492. | Aragh Sagi | Wikipedia audio article | 3 | |
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| 493. | Voiced epiglottal affricate | Wikipedia audio article | 3 | |
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| 494. | Diethylstilbestrol | Wikipedia audio article | 3 | |
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| 495. | Baghdad | Wikipedia audio article | 3 | |
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| 496. | List of Dune planets | Wikipedia audio article | 3 | |
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| 497. | Timeline of electromagnetic theory | Wikipedia audio article | 3 | |
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| 498. | Muslim Brotherhood | Wikipedia audio article | 3 | |
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| 499. | Diaconia University of Applied Sciences | Wikipedia audio article | 3 | |
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| 500. | Philippine Navy | Wikipedia audio article | 3 | |
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