并列题名：Vikings in 30 seconds vikings in 30 seconds 并列题名：Oceans in 30 seconds 并列题名：Da Vinci in 30 seconds Vikings in 30 seconds 并列题名：Myths in 30 seconds 并列题名：Insects in 30 seconds 并列题名：Maths in 30 seconds 并列题名：Science in 30 seconds 并列题名：Inventions in 30 seconds