LONDON -- If ever you want to experience 30 seconds of fleeting, heart-melting joy, just watch a high-definition video of two friendly tiger cubs playing with each other.
The clip above, which was filmed at ZSL London Zoo, shows two four-week-old Sumatran tiger clubs snuggling up to each other on the grass.
The footage of the endangered cubs was shared to coincide with International Tiger Day, which aims to raise awareness of the issues faced by tigers in the wild.
Here's one of the cubs with its mother, six-year-old Melati.Credit: ZSL LONDON ZOO/Matt Cetti-RobertsNature doesn't come much cuter than that.
(责任编辑：知識)