Floss

I began to use floss, cleaning between teeth.
It is said that it prevent cavities or pyorrhea.
I don't know how often I use it but I have been trying to use it once a day.

Night tour at Bios on the hill

Its most attractive feature is watching fireflies.
We could see flying fireflies on playing boats and
children of them on the ground.
The lights of them in dark was very impressive.

world community grid

Although I knew the existence of world community grid,
I haven't tried to access the site ever.

world community grid gathers computer resources from
people on the net and gives them to researchers who
use them for finding causes of diseases including cancer.

it runs during not using the computer,
so it won't disturb me.

http://www.worldcommunitygrid.org/