There's almost no real reason to own a flashlight now that all smartphones have bright flashes that work as flashlights.
However!
If, for some reason, you do want a dedicated flashlight in your life, a 15 year-old genius, Ann Makosinski from Victoria, B.C. has developed a new, innovative version of the flashlight.
To read the original article: A 15 Year-Old Girl From Canada Has Built A Flashlight Powered By The Heat Of A Hand - Business Insider