Subtitled in Vietnamese4:26How tall can a tree grow?Valentin HammoudiTranslated by Ngoc NguyenReviewed by Tiến Dũng Võ Văn
Subtitled in Vietnamese4:27Why do hospitals have particle accelerators?Pedro BrugarolasTranslated by Hoàng Trung LêReviewed by Tiến Dũng Võ Văn
