Too much light slows brown fat, suggesting link with obesity
![](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2015/05/ticker_brownfat_free.jpg?fit=860%2C460&ssl=1)
Making days longer with artificial light may slow brown fat's energy-burning abilities.
OiMax/Flickr (CC BY 2.0)
Making days longer with artificial light may slow brown fat's energy-burning abilities.
OiMax/Flickr (CC BY 2.0)