Fossil dinosaur slept like a bird
http://www.nature.com/news/2004/041011/full/041011-7.html
'Sleeping dragon' may have been trying to stay warm while it snoozed.
関連:「鳥の寝姿」の恐竜化石が中国で発見
http://www.nature.com/news/2004/041011/full/041011-7.html
'Sleeping dragon' may have been trying to stay warm while it snoozed.
関連:「鳥の寝姿」の恐竜化石が中国で発見