⚡ Science turns fiction into reality

What for more than a century inhabited the realm of science fiction today materializes as a scientific achievement: transmitting and guiding electricity through the air, without wires or physical contact.

This monumental advance, driven by researchers from Finland, Spain, and Canada, uses ultrasonic waves to transport electric sparks. 🤯

The study revealed a fascinating phenomenon: the ultrasonic waves heat the air, which, when expanding and losing density, is pushed in a precise direction. This creates a low-resistance path that electricity follows exactly, as if obeying an invisible route.

🚀 A before and after in technology

Precision Control: The spark can navigate around obstacles and even direct itself toward non-conductive materials.

Safe and Affordable: Unlike high-power lasers, ultrasound is harmless to eyes and skin and relies on compact and accessible equipment.

Revolutionary Applications: From powering selective circuits to sterilizing biological environments or creating the first contactless Braille system, with tiny and safe sparks.

🌐 Tesla's dream revives

Although the vision of a city with 'electric wifi' still faces challenges in open spaces, the fact of guiding a 4 cm spark around an obstacle marks a giant step toward the future that Nikola Tesla imagined: a connected world without a single wire. ✨