Scientists have recently launched a huge study to find out what makes a baby laugh and why.
The study, conducted at Birkbeck University's Centre for Brain and Cognitive Development, have received answers about children and their behavior from nearly 1,500 parents, the Daily Star reported.
Dr Caspar Addyman said that understanding babies would help them understand adults and as babies are "little scientists" who are discovering the world, researchers can discover a great deal through them.
Addyman said that their research also tries to find out which parent babies find the funniest and the general temperament of a baby.
The researchers are also trying to discover a correlation between laughing babies and a calmer temperament through a different questionnaire.
Addyman added that ninety per cent of babies have smiled in the first two months and laughed just a few weeks after that, while some babies have laughed unambiguously at just a few weeks old.