Polyethylene contains approximately 46 megajoules of chemical energy per kilogram (about ten times the energy content of TNT by mass) stored stably in its carbon-hydrogen bonds rather than as explosive potential. The Oak Ridge molten-salt process announced this week is essentially an engineered way to release that energy as liquid fuel rather than letting it sit in a landfill.

One motor, three jobs.

Always have a comma in your password, if part of a leak it will break the CSV. Follow me for more cybersecurity advice.

Space fact: Spacecraft have visited all the known planets in our solar system.

An Architect and a Structural Engineer can never be friends.

He was just following orders!

The first vehicle powered by an internal combustion engine was built and patented in 1807.

Each GPS satellite carries four atomic clocks, two caesium and two rubidium, because the system's position accuracy requires timing precision to within nanoseconds, and a single nanosecond of timing error translates to approximately 30 centimetres of position error at the speed of light. The clocks are kept redundant because a single failed clock on an orbital satellite cannot be replaced.

Mathematical puzzle. Find the area of the square.

A human hair is approximately 70,000 nanometres in diameter; the most advanced commercial transistors are manufactured at a 2-nanometre process node - meaning roughly 35,000 transistors could be placed side by side across the width of a single human hair. At this scale, transistors are made of structures just a few atoms wide, and quantum effects are no longer side effects - they are part of the design.

In normal internet operation, approximately 1-5% of data packets are lost or arrive corrupted during transmission. You almost never notice this because the Transmission Control Protocol (TCP), designed in 1973 by Vint Cerf and Bob Kahn, detects missing packets and automatically requests retransmission before delivering data to the application. TCP turns an inherently lossy physical network into a reliable logical channel. Every web page load, file download, and video call relies on this invisible error-correction happening thousands of times per second.

Pneumatic rivet-nut gun

Concrete is approximately 10 times stronger in compression (resisting being crushed) than in tension (resisting being pulled apart), which is why steel rebar is embedded inside it to carry tensile forces. The two materials also happen to have almost identical thermal expansion coefficients, meaning they expand and contract together under temperature changes without cracking apart at the interface, a fortunate coincidence that makes reinforced concrete practical.

The Golden Gate Bridge sways up to 8 metres laterally in high winds. It has been doing this since 1937. No structural damage has ever resulted. Every long bridge flexes under load. Every long bridge expands and contracts with temperature. Every long bridge sways in wind. This is not a flaw. It is the design. The Tacoma Narrows Bridge failed in 1940 not because it was too flexible. It failed because it was too rigid in the wrong direction, its solid plate girder deck could not shed wind energy, and resonance built up until it destroyed itself.

Modern USB-C cables contain an embedded microcontroller that negotiates power delivery (up to 240 watts), data transfer speed, and cable identity with the connected device - meaning the cable itself runs software and makes decisions. A high-end Thunderbolt cable contains more computing complexity than an original IBM PC, which had 29,000 transistors; the cable's controller IC has millions.

One million seconds ago was 11 days ago. One billion seconds ago was 31 years ago.

The siemens (symbol: S) is the derived unit of electric conductance. Another name for the siemens is the mho (/moʊ/). As the reciprocal of 1 Ohm, it is the word Ohm spelled backwards. Its symbol is an inverted capital Greek letter omega: ℧.

Thread repair kit

Modern transistors have gate oxide layers just a few atoms thick, so thin that electrons can quantum-mechanically tunnel through them even when the transistor is switched off, causing leakage current that wastes power and generates heat. This quantum tunnelling effect is one of the fundamental physical limits on how small silicon transistors can become, which is why the industry is researching alternative gate materials and entirely new transistor geometries.

In 2026, Northwestern physicists confirmed mathematically what resilience engineers have suspected for decades: perfectly uniform systems (power grids with identical generation sources, materials with identical crystal domains) are more vulnerable to cascade failure than systems with calibrated variation. The reason: identical components synchronise under stress and amplify disturbances rather than absorb them. Nature understood this first. No two neurons are identical. No two trees in a forest have the same root structure. No two immune cells respond identically to the same pathogen. Biodiversity is not aesthetics. It is structural engineering. The same principle applies to supply chains, financial systems, and software architectures. The engineering profession is still catching up to 600 million years of field testing.

A hydraulic wheel trolley lets one person lift and roll a heavy truck tire