N
Hacker Next
new
past
show
ask
show
jobs
submit
login
▲
Piezoelectric toothbrush reduces plaque
(
science.org
)
13 points by
Gaishan
1 days ago
|
1 comment
add comment
Rendered at 08:02:32 GMT+0000 (Coordinated Universal Time) with Cloudflare Workers.
xenospn 16 hours ago
[-]
TIL we have been using the same basic toothbrush design for over 1100 years!