Tootfinder

Researchers at the University of Pennsylvania and University of Michigan have created
the world’s smallest fully programmable, autonomous robots:
-- microscopic swimming machines that can independently sense and respond to their surroundings,
operate for months
and cost just a penny each.
Barely visible to the naked eye,
each robot measures about 200 by 300 by 50 micrometers,
smaller than a grain of salt.
Operating at the scale of many biologi…

Penn and Michigan Create World’s Smallest Programmable, Autonomous Robots
Smaller than a grain of salt, the robots can navigate their environment, measure temperatures and respond autonomously using tiny onboard computers.

not that anyone asked, but here's a chart of UM LSA grade inflation over the past 25 years
taken from
https://lsa.umich.edu/lsa/academics/lsa-academic-policies-and-procedures/grading-and-transcript-n…