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The U.S. Defense Advanced Research Projects Agency (DARPA) has set a new benchmark in wireless power transmission through its Persistent Optical Wireless Energy Relay (POWER) program.

In its latest demonstration, DARPA managed to transmit 800 watts of power over a distance of 1.6 kilometers (approximately 1 mile) using a laser-based system.

This significantly exceeds previous wireless power efforts, both in scale and practical efficiency. The experiment was conducted at the U.S. Army's Blossom Point test facility in Maryland.

-- How the Technology Works --

The POWER program uses high-energy infrared lasers to beam power across distances to remote receivers.

The core technology demonstrated was the Power Transmitting Optical System (PTOS) and Power Receiver Array Demonstrator (PRAD). The PRAD is a compact spherical receiver that focuses the laser through a small aperture using a parabolic mirror.

The laser light then strikes an array of photovoltaic (PV) cells, converting it back into usable electricity. This setup enables efficient, targeted wireless energy delivery using line-of-sight laser transmission.

-- Efficiency and Current Limitations --

During the test, the system achieved 20% end-to-end efficiency—meaning that 20% of the laser’s original energy was converted back into electricity at the receiving end.

While this may seem low, it is a notable accomplishment given the challenges of long-distance, high-power laser transmission. Improving efficiency remains a major goal in future phases.

The team believes that as this technology matures, it could support higher power levels and longer distances with better conversion rates.

Imagine flying without burning a single drop of fuel. That’s the radical promise of the Tang Jet — a plasma-based propulsion system developed by Chinese physicist Professor Jau Tang.

By mimicking a lightning bolt, the engine ionizes air into plasma, converting electricity directly into high-velocity thrust—no combustion, no emissions. The current prototype is small, but if scaled, it could revolutionize aviation and even electric space travel.

If it works, today’s jet engines could soon feel as outdated as steam locomotives.
Here’s what makes the Tang Jet a global game-changer —

#TangJet #ElectricJetEngine #CleanAviation #PlasmaThrust #JauTang

This inspiring story is about Pamela Gale Malhotra and her husband Anil Malhotra, founders of the Sai Sanctuary Trust in Kodagu (Coorg), Karnataka, India.

In 1991, the couple began purchasing degraded and abandoned farmland with the aim of restoring the native ecosystem.

Over more than two decades, they successfully reforested 300 acres, converting it into a thriving private wildlife sanctuary.

The area, once barren, now hosts:

Over 200 species of wildlife, including elephants, tigers, leopards, and rare birds like the Malabar grey hornbill.

Numerous species of medicinal plants, trees, and native flora.

A healthy rainforest ecosystem with natural water sources restored.

Their work is not just a testament to perseverance but also highlights the importance of rewilding and private conservation efforts in a country facing rapid deforestation and biodiversity loss.

Their sanctuary plays a vital role in maintaining ecological balance in the Western Ghats, one of the world’s biodiversity hotspots.

Japan has taken a bold step toward a cleaner energy future by deploying Kairyu, a massive 330-ton underwater turbine that generates electricity from ocean currents. Anchored to the seafloor, the turbine’s dual propellers harness the powerful Kuroshio Current — one of the world’s strongest — converting its steady flow into a limitless supply of renewable energy.

After completing 3.5 years of testing off the coast of southwestern Japan, the turbine proved it could deliver stable power and withstand harsh underwater conditions. With ocean currents estimated to meet up to 70% of Japan’s energy needs, this breakthrough positions Japan as a global leader in marine-based green energy and could revolutionize the world’s approach to sustainable electricity generation.

#OceanEnergy #RenewableInnovation #JapanTechnology #SustainableFuture #UnderwaterTurbine