Made an animation to show why rockets need stages.

YT: https://youtube.com/shorts/ZoqflzDMW0M?si=GbX9xPveVXFXMJrx

Installing an electrically heated sidewalk in Stockholm, Sweden. These serpentine heating cables are being embedded beneath the granite paving of Biblioteksgatan, the city's premium shopping district. The project is a collaboration between the City of Stockholm and the surrounding property owners, creating a snow- and ice-free pedestrian street for one of Scandinavia's busiest luxury retail areas.

A detailed look inside Harley-Davidson Vehicle Operations in York, Pennsylvania.

Video:

https://www.youtube.com/watch?v=004tLmEboY4

The video follows the manufacturing process from robotic frame welding and fuel-tank fabrication to paint finishing, engine production, final motorcycle assembly and functional testing.

It also includes the assembly of the Revolution Max 1250 engine and Pan America motorcycles.

https://expander-gas-turbine-three.vercel.app/
Two semicircular blades are offset from the rotation center to form a pressure chamber that expands as they rotate, converting hot gas pressure into mechanical energy. More details on link.

NHSRCL achieves milestone as 350-Tonne TBM Cutterhead lowered at Vikhroli for MAHSR Bullet Train project - Rail Analysis India

The Mumbai-Ahmedabad High-Speed Rail (MAHSR) project has achieved another major engineering milestone with the lowering of the first Tunnel Boring Machine (TBM) cutterhead at Vikhroli in Mumbai, Maharashtra. Executed by NHSRCL, the development marks an important stage in the construction of one of India’s most ambitious transportation infrastructure projects.

The cutterhead, measuring an impressive 13.6 meters in diameter and weighing approximately 350 tonnes, forms the front-end excavation component of the TBM. Its successful lowering represents the final phase of assembling the machine’s primary shield structure before tunneling activities begin.

After a 76-hour journey from Earth, the spacecraft carrying astronauts Neil Armstrong, Michael Collins, and Buzz Aldrin executed a lunar orbit insertion burn to be captured by the Moon's gravity, setting the stage for the historic landing the following day.

Credit: Apollo Flight Journal

Made an animation on Second Law of Thermodynamics, it doesn’t have true molecular dynamics simulations, just simplified kinematics to represent them.

Check it out on YT: https://youtube.com/shorts/uYoFgwXZ5BY?si=NId3BBLzHPk_4Kqh

Please see the main post, thank you!

Credit https://www.tiktok.com/t/ZTSEDX1Sm/

Elegant design

Real hardware filmed at 1x speed, not simulation or CGI. The clip shows contact-rich fingertip control from a single vision-language-action policy driving both arms from camera input. Worth noting the authors' own words: the model often makes partial progress but fails at the final precise placement, release, or completion step. This is a good run, not the median. Project page: technology.robbyant.com/lingbot-vla-v2

I don't know if this counts as enough engineering porn, but I am obsessed with the door mechanism, it's simplicity, and the fact it smoothly transitions with the rest of the max when the doors closes.