Extraordinary 4D ultrasound shows a lion embryo for the very first time.
(01:26)A shark, an emperor penguin, a kangaroo and a parasitic wasp, from conception to birth.
(02:10)A pogo stick, a careless jumper, and gravity. What could go wrong?
(02:59)A womb with a view. Was it cameras, models or CGI? The production team and scientific experts uncover the show's secrets.
(03:04)Hironobu Kan scans the Yonaguni monument. Using this data it's possible to drain the ocean.
(03:33)Oil is one of the most important commodities today. What would our world look like if we ran out of oil?
(01:14)Specially shot microscopy footage reveals the hidden world of twin fetal development.
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