Bollywood Hotty Kareena Kapoor has experienced coldest night of her life while shooting for Karan Johar's home production with beau Saif Ali Khan in Philadelphia.

According to sources, the couple spend their coldest night in heavy snowfall with a unit of 80 people.

Karan Johar's untitled flick is related to terrorism and is directed by Rensil D' Silva.

The sources further revealed that Bebo (nickname of Kareena Kapoor) has also experienced similar type of cold while shooting in mountainous terrain of Ladakh with the perfectionist Aamir Khan for the movie ‘3 idiots’.

Saif Ali Khan and Kareena Kapoor relations have always been the talk of the town.

A new research shows that the immune system kill bacteria more actively at night as compare to the day time. Shirasu-Hiza and her colleague David Schneider conducted the study on laboratory model organism, Drosophila melanogaster and found that the specific immune response known as phagocytosis oscillates with the body's circadian rhythm.

Study on fruit flies revealed that those sick with bacterial infections lost their healthy circadian rhythms, which paces the human body's healthy eating and sleeping cycle.

According to two major scientific studies, seven new genetic variants make people overweight. All new identified genes are linked to appetite control and obesity. An Icelandic biotechnology company, deCode Genetics, and an international academic consortium conducted the study and published their findings yesterday in the journal Nature Genetics.

According to a new research, scarring from heart attack can be reduced by targeting a protein involved in scar formation. During heart attack, damaged and injured heart gets excessive scar tissues that prevent the heart muscles from working at full capacity.

According to a U. S. study, healthy diet lowers the risk of breast cancer returning, by almost a third. Eating lots of fruit, vegetables and little fat can be beneficial.

San Diego team from the University of California found that healthy diet can reduce the chance of the cancer returning by 31%. Lead researcher Ellen Gold of the University of California Davis, said, "Women with early stage breast cancer who have hot flashes, have better survival and lower recurrence rates than women who don't."

Rahul Dravid still continues to get the backing of all those who matter, including the selectors, though he might have been unsuccessful to put an end to his failures in Chennai.

It has been learnt that David has got suggestions from the five wise men that he should take a break from the game for a while so he can regain his focus and come back afresh.