{"id":7873,"date":"2017-12-04T15:02:38","date_gmt":"2017-12-04T08:02:38","guid":{"rendered":"http:\/\/ttud.com.vn\/?p=7873"},"modified":"2017-12-04T15:02:38","modified_gmt":"2017-12-04T08:02:38","slug":"nhung-bi-an-khoa-hoc-moi-duoc-giai-dap","status":"publish","type":"post","link":"https:\/\/casta.ttud.com.vn\/index.php\/nhung-bi-an-khoa-hoc-moi-duoc-giai-dap\/","title":{"rendered":"Nh\u1eefng b\u00ed \u1ea9n khoa h\u1ecdc m\u1edbi \u0111\u01b0\u1ee3c gi\u1ea3i \u0111\u00e1p"},"content":{"rendered":"
\n

Khoa h\u1ecdc c\u0169ng gi\u1ed1ng nh\u01b0 m\u1ed9t tr\u00f2 ch\u01a1i \u00f4 s\u1ed1 b\u00ed \u1ea9n, v\u00e0 con ng\u01b0\u1eddi lu\u00f4n l\u00e0 nh\u1eefng ng\u01b0\u1eddi ch\u01a1i hi\u1ebfu k\u00ec nh\u1ea5t.<\/strong>\u00a0Nh\u1eefng b\u00ed \u1ea9n khoa h\u1ecdc lu\u00f4n c\u00f3 m\u1ed9t s\u1ef1 cu\u1ed1n h\u00fat k\u00ec l\u1ea1, v\u00e0 d\u01b0\u1eddng nh\u01b0 \u0111\u01b0\u1ee3c sinh ra \u0111\u1ec3 ch\u1edd \u0111\u1ee3i con ng\u01b0\u1eddi \u0111\u1ee7 tr\u00ed tu\u1ec7, \u1edf nh\u1eefng th\u1eddi \u0111\u1ea1i \u0111\u1ee7 c\u01a1 s\u1edf khoa h\u1ecdc gi\u1ea3i \u0111\u00e1p. D\u01b0\u1edbi \u0111\u00e2y l\u00e0 nh\u1eefng b\u00ed \u1ea9n trong m\u1ed9t th\u1eddi gian d\u00e0i, cu\u1ed1i c\u00f9ng c\u0169ng \u0111\u00e3 \u0111\u01b0\u1ee3c c\u00e1c nh\u00e0 khoa h\u1ecdc l\u1eadt m\u1edf.<\/p>\n

8. M\u1eadt m\u00e3 b\u00ed \u1ea9n c\u1ee7a ch\u1ee7 nh\u00e2n \u0111\u1ea3o Rhode<\/h2>\n

\"Nh\u1eefng<\/p>\n

Roger Williams l\u00e0 ng\u01b0\u1eddi s\u00e1ng l\u1eadp ra\u00a0\u0111\u1ea3o Rhode\u00a0v\u00e0 trong nh\u1eefng ng\u00e0y th\u00e1ng cu\u1ed1i \u0111\u1eddi, \u00f4ng \u0111\u00e3 ghi \u0111\u1ea7y ra trang b\u00eca c\u1ee7a cu\u1ed1n s\u00e1ch\u00a0“M\u1ed9t b\u00e0i vi\u1ebft v\u1ec1 s\u1ef1 kh\u00e1c bi\u1ec7t trong vi\u1ec7c h\u00f2a h\u1eefu gi\u1eefa nh\u1eefng t\u00edn \u0111\u1ed3 \u0111\u1ea1o tin l\u00e0nh”<\/em>\u00a0v\u1edbi nh\u1eefng ghi ch\u00fa v\u1ec1 c\u00e1c v\u1ea5n \u0111\u1ec1 kh\u00e1c nhau. Nh\u01b0ng c\u00f3 m\u1ed9t \u0111i\u1ec1u l\u1ea1 l\u00e0 sau nhi\u1ec1u n\u1ed7 l\u1ef1c, kh\u00f4ng ai c\u00f3 th\u1ec3 phi\u00ean d\u1ecbch \u0111\u01b0\u1ee3c \u00fd ngh\u0129a nh\u1eefng d\u00f2ng t\u1ed1c k\u00ed \u0111\u00f3. \u0110i\u1ec1u \u0111\u00f3 \u0111\u00e3 tr\u1edf th\u00e0nh m\u1ed9t v\u1ea5n \u0111\u1ec1 k\u00edch th\u00edch tr\u00ed t\u00f2 m\u00f2 c\u1ee7a nhi\u1ec1u nh\u00e0 nghi\u00ean c\u1ee9u. Nh\u1eefng d\u00f2ng \u0111\u00f3 c\u00f3 th\u1ec3 l\u00e0 b\u1ea5t c\u1ee9 \u0111i\u1ec1u g\u00ec: m\u1ed9t l\u1eddi th\u00fa t\u1ed9i, ch\u1ec9 d\u1eabn kho b\u00e1u\u2026<\/p>\n

Cu\u1ed1i c\u00f9ng, c\u00e1c nh\u00e0 nghi\u00ean c\u1ee9u \u0111\u00e3 ph\u00e1t hi\u1ec7n ra r\u1eb1ng nh\u1eefng m\u1eadt m\u00e3 \u00f4ng ghi ra th\u1ef1c ra l\u00e0 ki\u1ec3u vi\u1ebft t\u1ed1c k\u00fd \u1edf t\u00f2a \u00e1n Anh m\u00e0 \u00f4ng \u0111\u01b0\u1ee3c h\u1ecdc. Cu\u1ed1i c\u00f9ng ng\u01b0\u1eddi ta gi\u1ea3i m\u00e3 ra \u0111\u01b0\u1ee3c r\u1ea5t nhi\u1ec1u \u0111o\u1ea1n vi\u1ebft v\u1ec1 \u0111\u1ecba l\u00fd c\u1ed5, y h\u1ecdc v\u00e0 r\u1eeda t\u1ed9i cho tr\u1ebb s\u01a1 sinh.<\/p>\n

7. S\u1ef1 ti\u1ebfn h\u00f3a c\u1ee7a\u00a0Big Bang<\/h2>\n

\"Nh\u1eefng<\/p>\n

Darwin, ch\u1ee7 nh\u00e2n c\u1ee7a thuy\u1ebft ti\u1ebfn h\u00f3a, \u0111\u00e3 gi\u00e0nh kh\u00f4ng \u00edt th\u1eddi gian v\u00e0 c\u00f4ng s\u1ee9c \u0111i t\u00ecm b\u00ed \u1ea9n c\u1ee7a v\u1ee5 n\u1ed5 k\u1ec9 Cambri, d\u1eabn \u0111\u1ebfn s\u1ef1 thay \u0111\u1ed5i \u0111a d\u1ea1ng sinh h\u1ecdc, c\u0169ng l\u00e0 kho\u1ea3ng th\u1eddi gian m\u00e0 m\u00e0 c\u00e1c h\u00f3a th\u1ea1ch li\u00ean t\u1ee5c xu\u1ea5t hi\u1ec7n. Darwin \u0111\u00e3 mi\u00eau t\u1ea3 \u0111\u00e2y l\u00e0 giai \u0111o\u1ea1n kh\u00f4ng th\u1ec3 l\u00fd gi\u1ea3i \u0111\u01b0\u1ee3c.<\/p>\n

C\u00e1c nh\u00e0 khoa h\u1ecdc Australia th\u00e1ng 9\/2009 \u0111\u00e3 t\u00ecm ra \u0111\u01b0\u1ee3c c\u00e2u tr\u1ea3 l\u1eddi cho nh\u1eefng s\u1ef1 ki\u1ec7n \u0111\u01b0\u1ee3c m\u00f4 t\u1ea3 nh\u01b0 l\u00e0\u00a0\u201cS\u1ef1 ti\u1ebfn h\u00f3a c\u1ee7a thuy\u1ebft Big Bang\u201d.<\/em>\u00a0Nguy\u00ean nh\u00e2n ch\u00ednh c\u1ee7a hi\u1ec7n t\u01b0\u1ee3ng n\u00e0y l\u00e0 t\u1ed1c \u0111\u1ed9 ti\u1ebfn h\u00f3a trong k\u1ec9 Cambri di\u1ec5n ra nhanh h\u01a1n ch\u00fat \u00edt s\u01a1 v\u1edbi c\u00e1c giai \u0111o\u1ea1n kh\u00e1c. C\u00e1c s\u1ed1 li\u1ec7u t\u00ednh to\u00e1n ho\u00e0n to\u00e0n ph\u00f9 h\u1ee3p v\u1edbi l\u00fd thuy\u1ebft ti\u1ebfn h\u00f3a c\u1ee7a Darwin.<\/p>\n

6. V\u00ec sao\u00a0san h\u00f4\u00a0l\u1ea1i dao \u0111\u1ed9ng?<\/h2>\n

\"Nh\u1eefng<\/p>\n

Jean-Baptiste Lamarck l\u00e0 m\u1ed9t trong nh\u1eefng nh\u00e0 khoa h\u1ecdc \u0111\u1ea7u ti\u00ean nghi\u00ean c\u1ee9u san h\u00f4. V\u00e0 c\u00e2u h\u1ecfi V\u00ec sao san h\u00f4 l\u1ea1i dao \u0111\u1ed9ng? \u0111\u00e3 l\u00e0m c\u00e1c nh\u00e0 khoa h\u1ecdc \u0111au \u0111\u1ea7u, l\u00e0m \u00f4ng d\u00e0nh c\u1ea3 \u0111\u1eddi \u0111\u1ec3 nghi\u00ean c\u1ee9u. M\u00e3i \u0111\u1ebfn khi camera h\u1ed3ng ngo\u1ea1i ph\u00e1t tri\u1ec3n, m\u1ecdi th\u1ee9 m\u1edbi \u0111\u01b0\u1ee3c s\u00e1ng t\u1ecf.<\/p>\n

Sau khi s\u1eed d\u1ee5ng m\u1ed9t v\u00e0i m\u00e1y quay camera h\u1ed3ng ngo\u1ea1i, c\u00e1c nh\u00e0 khoa h\u1ecdc \u0111\u00e3 ph\u00e1t hi\u1ec7n ra r\u1eb1ng m\u1ed9t v\u00e0i lo\u1ea1i san h\u00f4 n\u00e0y dao \u0111\u1ed9ng t\u1edbi 95% th\u1eddi gian. S\u1eed d\u1ee5ng m\u1ed9t m\u00e1y \u1ea3nh \u0111\u1eb7t bi\u1ec7t, h\u1ecd ph\u00e1t hi\u1ec7n ra r\u1eb1ng nh\u1eefng chuy\u1ec3n \u0111\u1ed9ng c\u1ee7a san h\u00f4 l\u00e0 \u0111\u1ec3 ng\u0103n n\u01b0\u1edbc tho\u00e1t ra quanh r\u1eb7ng san h\u00f4. H\u1ecd c\u0169ng nh\u1eadn th\u1ea5y n\u1ed3ng \u0111\u1ed9 oxy trong n\u01b0\u1edbc xung quanh r\u1eb7ng san h\u00f4 \u0111\u01b0\u1ee3c gi\u1eef \u1edf m\u1ee9c th\u1ea5p, nh\u1eb1m t\u0103ng hi\u1ec7u qu\u1ea3 quang h\u1ee3p cho t\u1ea3o m\u00e0 san h\u00f4 d\u00f9ng l\u00e0m th\u1ee9c \u0103n.<\/p>\n

5. R\u0103ng c\u1ee7a lo\u00e0i c\u00e1 m\u1eadp r\u0103ng xo\u1eafn n\u1eb1m \u1edf \u0111\u00e2u?<\/h2>\n

\"Nh\u1eefng<\/p>\n

Helicoprion<\/strong>\u00a0l\u00e0 m\u1ed9t lo\u00e0i c\u00e1 gi\u1ed1ng c\u00e1 m\u1eadp v\u1edbi b\u1ed9 h\u00e0m xo\u1eafn k\u1ef3 l\u1ea1. H\u00f3a th\u1ea1ch \u0111\u1ea7u ti\u00ean c\u1ee7a lo\u00e0i n\u00e0y \u0111\u01b0\u1ee3c ph\u00e1t hi\u1ec7n v\u00e0o n\u0103m 1899, nh\u01b0ng m\u1ed9t ph\u1ea7n c\u1ef1c k\u00ec \u0111\u1eb7c bi\u1ec7t c\u1ee7a h\u00f3a th\u1ea1ch l\u00e0 n\u00f3 c\u00f3 m\u1ed9t b\u1ed9 h\u00e0m xo\u1eafn \u1ed1c k\u00ec l\u1ea1. C\u00e1c nh\u00e0 khoa h\u1ecdc \u0111\u00e3 r\u1ea5t b\u0103n kho\u0103n kh\u00f4ng bi\u1ebft nh\u1eefng chi\u1ebfc r\u0103ng c\u01b0a s\u1eafc nh\u01b0 dao c\u1ea1o n\u00e0y thu\u1ed9c b\u1ed9 ph\u1eadn n\u00e0o trong c\u01a1 th\u1ec3? K\u1ec3 t\u1eeb \u0111\u00f3, nhi\u1ec1u d\u1ef1 \u0111o\u00e1n \u0111\u00e3 \u0111\u01b0\u1ee3c \u0111\u01b0a ra nh\u01b0ng \u0111\u1ec1u ch\u01b0a c\u00f3 b\u1eb1ng ch\u1ee9ng thuy\u1ebft ph\u1ee5c. N\u00f3 c\u00f3 th\u1ec3 b\u1eaft ngu\u1ed3n t\u1eeb b\u1ea5t c\u1ee9 \u0111\u00e2u: h\u00e0m tr\u00ean, h\u00e0m d\u01b0\u1edbi, \u0111u\u00f4i\u2026. N\u1ebfu b\u1ea1n t\u00ecm ki\u1ebfm h\u00ecnh \u1ea3nh cho\u00a0“helicoprion”<\/em>\u00a0g\u1ea7n nh\u01b0 t\u1ea5t c\u1ea3 c\u00e1c h\u00ecnh \u1ea3nh m\u00e0 b\u1ea1n s\u1ebd t\u00ecm th\u1ea5y m\u00f4 t\u1ea3 b\u1ed9 khung xo\u1eafn \u1ed1c c\u1ee7a r\u0103ng cong xu\u1ed1ng t\u1eeb h\u00e0m d\u01b0\u1edbi.<\/p>\n

Sau khi s\u1eed d\u1ee5ng nh\u1eefng h\u00ecnh \u1ea3nh ch\u1ea5t l\u01b0\u1ee3ng cao do m\u00e1y CT tia X v\u00e0 t\u1ea1o ra m\u00f4 h\u00ecnh 3D chi\u1ebfc \u0111\u1ea7u c\u1ee7a lo\u00e0i n\u00e0y, h\u1ecd ph\u00e1t hi\u1ec7n ra r\u1eb1ng r\u0103ng c\u1ee7a lo\u00e0i n\u00e0y n\u1eb1m ho\u00e0n to\u00e0n b\u00ean trong mi\u1ec7ng, \u0111\u00f3ng vai tr\u00f2 nh\u01b0 m\u1ed9t \u201cnh\u00e0 m\u00e1y s\u1ea3n xu\u1ea5t r\u0103ng\u201d \u1edf ph\u00eda cu\u1ed1i c\u1ee7a h\u00e0m d\u01b0\u1edbi.<\/p>\n

4. Ng\u01b0\u1eddi Susquehannock \u0103n th\u1ecbt ng\u01b0\u1eddi<\/h2>\n

\"Nh\u1eefng<\/p>\n

Ng\u01b0\u1eddi Susquehannock l\u00e0 m\u1ed9t b\u1ed9 l\u1ea1c b\u1ea3n \u0111\u1ecba \u1edf ch\u00e2u M\u1ef9. H\u1ecd b\u1ecb nh\u1eefng ng\u01b0\u1eddi \u0111\u1ecbnh c\u01b0 ch\u00e2u \u00e2u g\u1eafn cho ti\u1ebfng x\u1ea5u l\u00e0 \u0111\u00e3 t\u00e0n s\u00e1t b\u1ed9 l\u1ea1c l\u00e1ng gi\u1ec1ng Shenks Ferry v\u00e0 t\u1eadp qu\u00e1n \u0103n th\u1ecbt ng\u01b0\u1eddi man r\u1ee3.<\/p>\n

April Beisaw, m\u1ed9t nh\u00e0 kh\u1ea3o c\u1ed5 h\u1ecdc thu\u1ed9c \u0111\u1ea1i h\u1ecdc Vassar, v\u00e0 \u0111\u1ed3ng nghi\u1ec7p d\u1ef1a tr\u00ean m\u1ed9t s\u1ed1 b\u1eb1ng ch\u1ee9ng kh\u1ea3o c\u1ed5 ban \u0111\u1ea7u \u0111\u00e3 nghi ho\u1eb7c v\u1ea5n \u0111\u1ec1 n\u00e0y v\u00e0 quy\u1ebft t\u00ecm ra b\u1eb1ng ch\u1ee9ng \u0111\u1ec3 minh oan cho b\u1ed9 l\u1ea1c n\u00e0y. B\u00e0 c\u00f9ng 2 c\u1ed9ng s\u1ef1 \u0111\u00e3 nghi\u00ean c\u1ee9u h\u01a1n 2.000 c\u1ed5 v\u1eadt, c\u00f9ng c\u00e1c ghi ch\u00e9p t\u1ea1i nhi\u1ec1u b\u1ea3o t\u00e0ng. K\u1ebft qu\u1ea3 l\u00e0 nh\u00f3m l\u00e0m vi\u1ec7c c\u1ee7a b\u00e0 \u0111\u00e3 kh\u00f4ng t\u00ecm th\u1ea5y b\u1ea5t c\u1ee9 m\u1ed9t b\u1eb1ng ch\u1ee9ng n\u00e0o ch\u1ee9ng minh \u0111\u00e3 c\u00f3 m\u1ed9t cu\u1ed9c th\u1ea3m s\u00e1t x\u1ea3y ra. \u0110\u00e2y c\u00f3 th\u1ec3 l\u00e0 m\u1ed9t \u00e2m m\u01b0u nh\u1eb1m th\u1ea3m s\u00e1t t\u1ed9c ng\u01b0\u1eddi n\u00e0y c\u1ee7a nh\u1eefng ng\u01b0\u1eddi nh\u1eadp c\u01b0 M\u1ef9 \u0111\u1ea7u ti\u00ean. V\u00e0 v\u1edbi nh\u1eefng b\u1eb1ng ch\u1ee9ng n\u00e0y, b\u00e0 hy v\u1ecdng l\u1ecbch s\u1eed s\u1ebd \u0111\u01b0\u1ee3c vi\u1ebft l\u1ea1i.<\/p>\n

3. T\u1ea1i sao lo\u00e0i Crustacean kh\u00f4ng c\u00f3 d\u1ea1ng tr\u01b0\u1edfng th\u00e0nh<\/h2>\n

\"Nh\u1eefng<\/p>\n

Cerataspis monstrosa l\u00e0 t\u00ean g\u1ecdi c\u1ee7a m\u1ed9t lo\u00e0i \u0111\u1ed9ng v\u1eadt gi\u00e1p x\u00e1c l\u1ea7n \u0111\u1ea7u ti\u00ean \u0111\u01b0\u1ee3c ph\u00e1t hi\u1ec7n v\u00e0o kho\u1ea3ng 180 n\u0103m tr\u01b0\u1edbc. Lo\u00e0i n\u00e0y ch\u1ec9 \u0111\u01b0\u1ee3c t\u00ecm th\u1ea5y \u1edf d\u1ea1ng \u1ea5u tr\u00f9ng b\u00ean trong ru\u1ed9t c\u00e1. Ch\u00fang ta ch\u01b0a bao gi\u1edd t\u00ecm th\u1ea5y \u0111\u01b0\u1ee3c lo\u00e0i n\u00e0y \u1edf d\u1ea1ng tr\u01b0\u1edfng th\u00e0nh. \u0110i\u1ec1u n\u00e0y l\u00e0m c\u00e1c nh\u00e0 khoa h\u1ecdc nghi v\u1ea5n, \u0111\u00e3 gi\u00e0nh nhi\u1ec1u c\u00f4ng s\u1ee9c \u0111i t\u00ecm, c\u00f9ng nhi\u1ec1u gi\u1ea3 thuy\u1ebft \u0111\u01b0\u1ee3c \u0111\u01b0a ra, nh\u01b0ng \u0111\u1ec1u ch\u01b0a c\u00f3 b\u1eb1ng ch\u1ee9ng thuy\u1ebft ph\u1ee5c. V\u00e0 cho \u0111\u1ebfn khi c\u00f4ng ngh\u1ec7 ADN ph\u00e1t tri\u1ec3n, m\u1ecdi th\u1ee9 m\u1edbi \u0111\u01b0\u1ee3c s\u00e1ng t\u1ecf. M\u1ed9t c\u00f4ng ngh\u1ec7 m\u1edbi ph\u00e1t tri\u1ec3n 10 n\u0103m \u0111\u00e3 tr\u1ea3 l\u1eddi b\u00ed \u1ea9n 200 tu\u1ed5i.<\/p>\n

Gi\u00e1o s\u01b0 Keith Crandall thu\u1ed9c tr\u01b0\u1eddng \u0111\u1ea1i h\u1ecdc George Washington \u0111\u00e3 ti\u1ebfn h\u00e0nh nghi\u00ean c\u1ee9u ADN c\u1ee7a lo\u00e0i n\u00e0y v\u00e0 ph\u00e1t hi\u1ec7n ra r\u1eb1ng d\u1ea1ng \u1ea5u tr\u00f9ng m\u00e0 ch\u00fang ta th\u1ea5y th\u1ef1c ch\u1ea5t l\u00e0 m\u1ed9t lo\u00e0i ho\u00e0n to\u00e0n kh\u00e1c, c\u00f3 t\u00ean khoa h\u1ecdc l\u00e0 Plesiopenaeus armatus. C\u00f2n d\u1ea1ng tr\u01b0\u1edfng th\u00e0nh c\u1ee7a lo\u00e0i n\u00e0y th\u1ef1c ch\u1ea5t l\u00e0 m\u1ed9t con t\u00f4m s\u1ed1ng d\u01b0\u1edbi v\u00f9ng n\u01b0\u1edbc s\u00e2u c\u00f3 h\u00ecnh d\u00e1ng ho\u00e0n to\u00e0n kh\u00e1c so v\u1edbi h\u1ed3i nh\u1ecf. H\u01a1n n\u1eefa, ch\u00fang ta kh\u00f3 m\u00e0 b\u1eaft g\u1eb7p \u0111\u01b0\u1ee3c n\u00f3 do t\u00f4m n\u00e0y th\u01b0\u1eddng s\u1ed1ng r\u1ea5t s\u00e2u d\u01b0\u1edbi bi\u1ec3n \u0110\u1ea1i T\u00e2y D\u01b0\u01a1ng.<\/p>\n

2. Ngu\u1ed3n g\u1ed1c c\u1ee7a ch\u00f3 s\u00f3i \u0111\u1ea3o Falkland<\/h2>\n

\"Nh\u1eefng<\/p>\n

Theo thuy\u1ebft ti\u1ebfn h\u00f3a c\u1ee7a Darwin, s\u1ef1 h\u00ecnh th\u00e0nh lo\u00e0i m\u1edbi tr\u00ean \u0111\u1ea3o hoang l\u00e0 do c\u00e1ch ly \u0111\u1ecba l\u00fd. Ngh\u0129a l\u00e0 ban \u0111\u1ea7u, \u0111\u1ea3o g\u1eafn v\u1edbi \u0111\u1ea5t li\u1ec1n, m\u1ed9t nh\u00f3m c\u00e1 th\u1ec3 c\u1ee7a m\u1ed9t lo\u00e0i n\u00e0o \u0111\u00f3 ph\u00e2n b\u1ed1 tr\u00ean \u0111\u1ea3o. Khi \u0111\u1ea3o t\u00e1ch kh\u1ecfi l\u1ee5c \u0111\u1ecba, nh\u00f3m c\u00e1 th\u1ec3 \u0111\u00f3 t\u00e1ch kh\u00f3i lo\u00e0i c\u1ee7a ch\u00fang, t\u1ef1 sinh s\u1ea3n, th\u1ebf h\u1ec7 n\u00e0y qua th\u1ebf h\u1ec7 kh\u00e1c \u0111\u1ec3 th\u00edch nghi v\u1edbi m\u00f4i tr\u01b0\u1eddng m\u1edbi, v\u00e0 h\u00ecnh th\u00e0nh m\u1ed9t lo\u00e0i m\u1edbi.<\/p>\n

Ch\u00f3 s\u00f3i tr\u00ean \u0111\u1ea3o Falkland l\u00e0 lo\u00e0i \u0111\u1ed9ng v\u1eadt c\u00f3 v\u00fa duy nh\u1ea5t s\u1ed1ng tr\u00ean \u0111\u1ea3o n\u00e0y khi con ng\u01b0\u1eddi ph\u00e1t hi\u1ec7n ra \u0111\u1ea3o \u1edf th\u1ebf k\u1ec9 17. Lo\u00e0i ch\u00f3 s\u00f3i n\u00e0y \u0111\u00e3 b\u1ecb tuy\u1ec7t ch\u1ee7ng v\u00e0o n\u0103m 1876 do h\u00e0nh \u0111\u1ed9ng s\u0103n b\u1eaft c\u1ee7a con ng\u01b0\u1eddi. D\u1ef1a tr\u00ean c\u01a1 s\u1edf tr\u00ean, c\u00e1c nh\u00e0 khoa h\u1ecdc tr\u01b0\u1edbc \u0111\u00e2y tin r\u1eb1ng lo\u00e0i ch\u00f3 s\u00f3i n\u00e0y \u0111\u00e3 ph\u00e1t tri\u1ec3n d\u1ef1a tr\u00ean m\u1ed9t gi\u1ed1ng ch\u00f3 s\u00f3i c\u1ed5 s\u1ed1ng c\u00e1ch \u0111\u00e2y kho\u1ea3ng 330.000 n\u0103m tr\u00ean \u0111\u1ea5t li\u1ec1n, n\u01a1i h\u00f2n \u0111\u1ea3o b\u1ecb t\u00e1ch ra. Nh\u01b0ng nh\u1eefng m\u1eabu nghi\u00ean c\u1ee9u ADN g\u1ea7n \u0111\u00e2y ch\u1ee9ng minh r\u1eb1ng, th\u1ef1c ra \u0111\u1ea3o \u0111\u01b0\u1ee3c t\u00e1ch ra t\u1eeb tr\u01b0\u1edbc, v\u00e0 lo\u00e0i ch\u00f3 n\u00e0y ch\u1ec9 \u0111\u01b0\u1ee3c t\u00e1ch ra v\u00e0o kho\u1ea3ng 16.000 n\u0103m tr\u01b0\u1edbc, \u1edf th\u1eddi k\u00ec b\u0103ng h\u00e0, do m\u1ed9t c\u00e2y c\u1ea7u b\u0103ng n\u1ed1i li\u1ec1n \u0111\u1ea3o Falkland v\u00e0 \u0111\u1ea5t li\u1ec1n. Khi b\u0103ng tan, c\u00e1c c\u00e1 th\u1ec3 ch\u00f3 s\u00f3i l\u00ean \u0111\u1ea3o b\u1ecb c\u00e1ch li \u0111\u1ecba l\u00fd v\u00e0 h\u00ecnh th\u00e0nh lo\u00e0i m\u1edbi.<\/p>\n

1. T\u00e2m Tr\u00e1i \u0110\u1ea5t chuy\u1ec3n \u0111\u1ed9ng nh\u01b0 th\u1ebf n\u00e0o?<\/h2>\n

\"Nh\u1eefng<\/p>\n

T\u00e2m Tr\u00e1i \u0110\u1ea5t\u00a0\u0111\u01b0\u1ee3c c\u1ea5u t\u1ea1o ch\u1ee7 y\u1ebfu b\u1edfi hai th\u00e0nh ph\u1ea7n Niken v\u00e0 s\u1eaft. L\u00f5i b\u00ean trong c\u1ee7a Tr\u00e1i \u0110\u1ea5t\u0111\u01b0\u1ee3c t\u1ea1o th\u00e0nh t\u1eeb s\u1eaft \u1edf d\u1ea1ng r\u1eafn, v\u00e0 chuy\u1ec3n \u0111\u1ed9ng quay ng\u01b0\u1ee3c chi\u1ec1u kim \u0111\u1ed3ng h\u1ed3, nh\u01b0ng l\u00f5i ngo\u00e0i \u0111\u01b0\u1ee3c t\u1ea1o th\u00e0nh t\u1eeb s\u1eaft \u1edf d\u1ea1ng l\u1ecfng, l\u1ea1i quay theo h\u01b0\u1edbng ng\u01b0\u1ee3c l\u1ea1i. Tuy nhi\u00ean, h\u1ecd kh\u00f4ng gi\u1ea3i th\u00edch \u0111\u01b0\u1ee3c nguy\u00ean nh\u00e2n c\u1ee7a hi\u1ec7n t\u01b0\u1ee3ng n\u00e0y.
\nNh\u1eefng b\u00ed \u1ea9n khoa h\u1ecdc m\u1edbi \u0111\u01b0\u1ee3c gi\u1ea3i \u0111\u00e1p<\/p>\n

G\u1ea7n \u0111\u00e2y, c\u00e1c nh\u00e0 khoa h\u1ecdc c\u1ee7a \u0111\u1ea1i h\u1ecdc Leed \u0111\u00e3 s\u1eed d\u1ee5ng m\u1ed9t si\u00eau m\u00e1y t\u00ednh \u0111\u1ec3 mi\u00eau t\u1ea3 m\u1ed1i quan h\u1ec7 n\u00e0y v\u1edbi \u0111\u1ed9 ch\u00ednh x\u00e1c g\u1ea5p nhi\u1ec1u l\u1ea7n so v\u1edbi tr\u01b0\u1edbc \u0111\u00e2y. V\u00e0 nguy\u00ean nh\u00e2n c\u1ee7a s\u1ef1 kh\u00e1c bi\u1ec7t n\u00e0y l\u00e0 do c\u00e1c ho\u1ea1t \u0111\u1ed9ng \u0111\u1ed1i l\u1eadp v\u00e0 t\u01b0\u01a1ng \u0111\u1ed3ng d\u1ef1a theo Lu\u1eadt chuy\u1ec3n \u0111\u1ed9ng th\u1ee9 3 c\u1ee7a Newton. Ch\u00ednh t\u1eeb tr\u01b0\u1eddng l\u00e0 nguy\u00ean nh\u00e2n khi\u1ebfn c\u00e1c l\u00f5i Tr\u00e1i \u0110\u1ea5t quay theo h\u01b0\u1edbng kh\u00e1c nhau.<\/p>\n<\/div>\n

Theo Tr\u00ed Th\u1ee9c Tr\u1ebb<\/strong><\/span><\/div>\n","protected":false},"excerpt":{"rendered":"

Khoa h\u1ecdc c\u0169ng gi\u1ed1ng nh\u01b0 m\u1ed9t tr\u00f2 ch\u01a1i \u00f4 s\u1ed1 b\u00ed \u1ea9n, v\u00e0 con ng\u01b0\u1eddi lu\u00f4n l\u00e0 nh\u1eefng ng\u01b0\u1eddi ch\u01a1i hi\u1ebfu k\u00ec nh\u1ea5t.\u00a0Nh\u1eefng b\u00ed \u1ea9n khoa h\u1ecdc lu\u00f4n c\u00f3 m\u1ed9t s\u1ef1 cu\u1ed1n h\u00fat k\u00ec l\u1ea1, v\u00e0 d\u01b0\u1eddng nh\u01b0 \u0111\u01b0\u1ee3c sinh ra \u0111\u1ec3 ch\u1edd \u0111\u1ee3i con ng\u01b0\u1eddi \u0111\u1ee7 tr\u00ed tu\u1ec7, \u1edf nh\u1eefng th\u1eddi \u0111\u1ea1i \u0111\u1ee7 c\u01a1 […]<\/p>\n","protected":false},"author":18,"featured_media":7874,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[47],"tags":[],"class_list":["post-7873","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-tin-tuc"],"_links":{"self":[{"href":"https:\/\/casta.ttud.com.vn\/index.php\/wp-json\/wp\/v2\/posts\/7873","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/casta.ttud.com.vn\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/casta.ttud.com.vn\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/casta.ttud.com.vn\/index.php\/wp-json\/wp\/v2\/users\/18"}],"replies":[{"embeddable":true,"href":"https:\/\/casta.ttud.com.vn\/index.php\/wp-json\/wp\/v2\/comments?post=7873"}],"version-history":[{"count":1,"href":"https:\/\/casta.ttud.com.vn\/index.php\/wp-json\/wp\/v2\/posts\/7873\/revisions"}],"predecessor-version":[{"id":7875,"href":"https:\/\/casta.ttud.com.vn\/index.php\/wp-json\/wp\/v2\/posts\/7873\/revisions\/7875"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/casta.ttud.com.vn\/index.php\/wp-json\/wp\/v2\/media\/7874"}],"wp:attachment":[{"href":"https:\/\/casta.ttud.com.vn\/index.php\/wp-json\/wp\/v2\/media?parent=7873"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/casta.ttud.com.vn\/index.php\/wp-json\/wp\/v2\/categories?post=7873"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/casta.ttud.com.vn\/index.php\/wp-json\/wp\/v2\/tags?post=7873"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}