| 401. | Moses | Wikipedia audio article | 3 | |
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| 402. | Peopling of the world | Wikipedia audio article | 3 | |
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| 403. | Biot's respiration | Wikipedia audio article | 3 | |
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| 404. | Pope Siricius | Wikipedia audio article | 3 | |
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| 405. | Gustav Ludwig Hertz | Wikipedia audio article | 3 | |
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| 406. | Suutei tsai | Wikipedia audio article | 3 | |
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| 407. | Sabellianism | Wikipedia audio article | 3 | |
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| 408. | Whiskey Rebellion | Wikipedia audio article | 3 | |
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| 409. | Gordon Lightfoot | Wikipedia audio article | 3 | |
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| 410. | Geology | Wikipedia audio article | 3 | Vlog |
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| 411. | Krishna | Wikipedia audio article | 3 | |
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| 412. | Ernest Rutherford | Wikipedia audio article | 3 | |
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| 413. | Giovanni Pico della Mirandola | Wikipedia audio article | 3 | |
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| 414. | Caria | Wikipedia audio article | 3 | |
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| 415. | Sophia, Electress of Hanover | Wikipedia audio article | 3 | |
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| 416. | Burkhanism | Wikipedia audio article | 3 | |
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| 417. | Palawano language | Wikipedia audio article | 3 | |
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| 418. | Jesus | Wikipedia audio article | 3 | |
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| 419. | Pandya | Wikipedia audio article | 3 | |
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| 420. | Principality of Mingrelia | Wikipedia audio article | 3 | |
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| 421. | Argentina | Wikipedia audio article | 3 | |
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| 422. | Durga Puja | Wikipedia audio article | Wikipedia audio article | 3 | |
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| 423. | Canned soup | Wikipedia audio article | 3 | |
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| 424. | Stenbolone | Wikipedia audio article | 3 | |
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| 425. | War elephant | Wikipedia audio article | 3 | |
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| 426. | Chocolate-coated marshmallow treats | Wikipedia audio article | 3 | |
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| 427. | Republican Fascist Party | Wikipedia audio article | 3 | |
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| 428. | Inter-University Centre for Astronomy and Astrophysics | Wikipedia audio article | 3 | |
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| 429. | John Vane | Wikipedia audio article | 3 | |
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| 430. | Johor Sultanate | Wikipedia audio article | 3 | |
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| 431. | India in World War II | Wikipedia audio article | 3 | |
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| 432. | List of continuity-related mathematical topics | Wikipedia audio article | 4 | |
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| 433. | TILLING (molecular biology) | Wikipedia audio article | 3 | Vlog |
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| 434. | Dimethyltrienolone | Wikipedia audio article | 3 | |
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| 435. | Hino Motors | Wikipedia audio article | 3 | |
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| 436. | Hosea Kutako International Airport | Wikipedia audio article | 3 | |
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| 437. | Twelver | Wikipedia audio article | 3 | |
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| 438. | United Africa Company | Wikipedia audio article | 3 | |
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| 439. | Tolman–Oppenheimer–Volkoff equation | Wikipedia audio article | 3 | |
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| 440. | Christianity in the 3rd century | Wikipedia audio article | 3 | |
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| 441. | Neutron star | Wikipedia audio article | 3 | | Neutron Star
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| 442. | Adam Philippe, Comte de Custine | Wikipedia audio article | 3 | |
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| 443. | Shaivism | Wikipedia audio article | 3 | |
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| 444. | Liao dynasty | Wikipedia audio article | 3 | |
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| 445. | Valentinian I | Wikipedia audio article | 3 | |
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| 446. | Characteristic impedance of free space | Wikipedia audio article | 3 | |
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| 447. | Royal Aircraft Establishment | Wikipedia audio article | 3 | |
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| 448. | Vikram A Sarabhai Community Science Centre | Wikipedia audio article | 3 | |
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| 449. | Computer Entertainment Rating Organization | Wikipedia audio article | 3 | |
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| 450. | Glossary of botanical terms | Wikipedia audio article | 3 | |
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| 451. | Bangladesh women's national kabaddi team | Wikipedia audio article | 3 | |
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| 452. | Kasturba Gandhi | Wikipedia audio article | 3 | |
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| 453. | List of lists of lists | Wikipedia audio article | 3 | |
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| 454. | Gouverneur Morris | Wikipedia audio article | 3 | |
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| 455. | Patrice de MacMahon, Duke of Magenta | Wikipedia audio article | 3 | |
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| 456. | Anglican | Wikipedia audio article | 3 | |
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| 457. | Anders Jonas Ångström | Wikipedia audio article | 3 | |
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| 458. | Battle of Boyacá | Wikipedia audio article | 3 | |
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| 459. | Jainism | Wikipedia audio article | 3 | |
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| 460. | Fluorescent lamp | Wikipedia audio article | 3 | |
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| 461. | Arab rule in Georgia | Wikipedia audio article | 3 | |
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| 462. | Kandyan period | Wikipedia audio article | 3 | |
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| 463. | NOTS-EV-1 Pilot | Wikipedia audio article | 3 | |
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| 464. | Proto-Indo-Iranian religion | Wikipedia audio article | 3 | |
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| 465. | Magic number (physics) | Wikipedia audio article | 3 | |
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| 466. | P. Kakkan | Wikipedia audio article | 3 | |
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| 467. | Nicobarese languages | Wikipedia audio article | 3 | |
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| 468. | Voiceless retroflex affricate | Wikipedia audio article | 3 | |
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| 469. | Khaksars | Wikipedia audio article | 3 | |
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| 470. | 100th Light Infantry Division (Wehrmacht) | Wikipedia audio article | 3 | |
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| 471. | North Dakota | Wikipedia audio article | 3 | |
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| 472. | Georgian language | Wikipedia audio article | 3 | |
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| 473. | Yugoslav Partisans | Wikipedia audio article | 3 | |
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| 474. | Judeo-Iranian languages | Wikipedia audio article | 3 | |
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| 475. | Madhyamakālaṃkāra | Wikipedia audio article | 3 | |
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| 476. | Hopkins Ultraviolet Telescope | Wikipedia audio article | 3 | |
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| 477. | Awadhi language | Wikipedia audio article | 3 | |
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| 478. | My Life: A Spoken Autobiography | Wikipedia audio article | 3 | |
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| 479. | Wheel of Fortune (U.S. game show) | Wikipedia audio article | 3 | Show |
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| 480. | Nikolay Basov | Wikipedia audio article | 3 | |
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| 481. | Proceedings of the National Academy of Sciences, India Section A: Physical Sciences | Wikipedia ... | 3 | |
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| 482. | Nicobar Islands | Wikipedia audio article | 3 | |
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| 483. | Qajar dynasty | Wikipedia audio article | 3 | |
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| 484. | Nokia | Wikipedia audio article | 3 | |
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| 485. | Aquatic ape hypothesis | Wikipedia audio article | 3 | |
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| 486. | Mittelafrika | Wikipedia audio article | 3 | |
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| 487. | National Security Act (India) | Wikipedia audio article | 3 | |
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| 488. | Charles de Gaulle | Wikipedia audio article | 3 | |
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| 489. | United Nations Commission on International Trade Law | Wikipedia audio article | 3 | |
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| 490. | Trans-Neptunian object | Wikipedia audio article | 3 | |
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| 491. | Mazdak | Wikipedia audio article | 3 | |
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| 492. | The Eighteenth Brumaire of Louis Napoleon | Wikipedia audio article | 3 | |
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| 493. | Timeline of computer viruses and worms | Wikipedia audio article | 3 | |
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| 494. | Timeline of the Magellan–Elcano circumnavigation | Wikipedia audio article | 3 | |
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| 495. | Universal Disk Format | Wikipedia audio article | 3 | |
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| 496. | Emirate of Transjordan | Wikipedia audio article | 3 | |
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| 497. | Mongolian Americans | Wikipedia audio article | 3 | |
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| 498. | Umayyad Caliphate | Wikipedia audio article | 3 | |
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| 499. | Christianity in the 20th century | Wikipedia audio article | 3 | |
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| 500. | Pope Nicholas III | Wikipedia audio article | 3 | |
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