Luminousbeings,creatureswiththeirowninternallight,enchantandastonishus.Anyonewhohasseenafireflyoraglow-wormcannothelpbutfallundertheirspell.Theseaatnightsparklesasmillionsofluminousplanktonrevealtheshapesofdolphinsinatrulymagicallightshow.Butwhydoanimalsproducelivinglight?Forcenturieswecouldonlymarvelatthebeautyandthem…

大堡礁(英文：TheGreatBarrierReef)，是世界最大最长的珊瑚礁群，位于南半球，它纵贯于澳洲的东北沿海，北从托雷斯海峡，南到南回归线以南，绵延伸展共有2011公里，最宽处161公里。有2900个大小珊瑚礁岛，自然景观非常特殊。大堡礁的南端离海岸最远有241公里，北端较靠近，最近处离海岸仅16公里。在落潮时，部分的珊瑚礁露出水面形成珊瑚岛。在…

Nature’sGreatEventsisaBBCnaturedocumentaryseriesbroadcastfrom11February2009.[1]TheBritishversionisnarratedbyDavidAttenboroughandisbeingshownonBBCOneandBBCHD.Itshouldnotbeconfusedwiththe1996Reader’sDigestvideoseriesofthesamename.IntheUSA,th…