Can We Build A REAL Micro Drone?

Are nano or micro drones possible? We take a look of how to build the smallest drone in the world.

Sources & Credits:
Robobee (Harvard)
https://wyss.harvard.edu/technology/robobees-autonomous-flying-microrobots/
https://www.youtube.com/watch?v=hEZ7rHRifVc

Cyclocopter (Texas A&M)
https://www.youtube.com/watch?v=WTUCCkTcIW0

Flight Controller - https://oscarliang.com/review-piko-blx-fc-flight-controller/
Camera - https://www.tweaktown.com/news/68384/worlds-smallest-camera-size-grain-sand/index.html

Drone Swarm (MAVLab TU Delft)
https://www.youtube.com/watch?v=jU4wsxwM1No

RoboFly (Washington Univ)
https://www.youtube.com/watch?v=KKEbJOi2_hA

Robobee (Untethered)
https://www.youtube.com/watch?v=K9Jh9IIByHg&feature=emb_title

RF Charging - http://www.humavox.com/blog/rf-wireless-charging-works/

Ionocraft(California Univ)
https://www.youtube.com/watch?v=6rDBV12sCB4&feature=emb_title

Aerodynamics
https://arc.aiaa.org/doi/abs/10.2514/1.C031996
https://arc.aiaa.org/doi/abs/10.2514/1.J055221
https://www.youtube.com/watch?v=hywBEaGiO4k

Piccolissimo (MOD Lab)
https://www.youtube.com/watch?v=UE47bcCxT_I

Robot Fly (Washington Univ)
https://www.youtube.com/watch?v=jDjxJ70ljTk&feature=emb_title

Music:
"Future Background Music" & "No Time to Die" By CO.AG Music
https://www.youtube.com/channel/UCcavSftXHgxLBWwLDm_bNvA