Yogendra Singh

Yogendra Singh

Yogendra Singh is the founder and editor of Structural Signals, an independent publication covering long-term trends in technology, economics, energy, geopolitics and society.

The Silence Question

Commuter wearing over-ear headphones on a crowded train.

Noise-Canceling Headphones and the Unanswered Questions About Auditory Processing Some people with normal results on standard hearing tests still struggle to follow conversation in noisy environments. They can detect quiet tones in a testing booth yet have difficulty separating a…

The World Through Blurred Eyes

Schoolgirl wearing glasses seated at a desk with books in front of a classroom chalkboard.

The Global Rise of Childhood Myopia and Its Long-Term Consequences A nine-year-old child leans over an open exercise notebook, her pencil moving across ruled paper without hesitation. Every detail six inches from her face is sharp. But when she raises…

The Cancer Vaccine Revolution

Illustration of personalized cancer therapy, showing tumour sampling, genetic sequencing, data analysis and tailored treatment.

How Personalized Vaccines Could Prevent Recurrence, and Why Biology and Cost Still Stand in the Way I. Six Years After Pancreatic Surgery In December 2019, Memorial Sloan Kettering Cancer Center (MSK) surgeons resected a pancreatic ductal adenocarcinoma (PDAC) from 71-year-old…

The Passport Lottery

Spanish, French, Israeli and United States passports arranged side by side

How Birth, Wealth and Borders Divide the World’s Freedom to Move I. Two Passports, Two Worlds A Singaporean passport offered access to 192 destinations without a visa in advance in the July 2026 update of the Henley Passport Index. An…

The Default Male

Female patient discussing medical imaging with a doctor during a clinical consultation.

How Male-Centric Medicine Leaves Women Misdiagnosed and Undertreated 1. Opening: The Patient Who Waits In October 2026, Nature Medicine published a harmonized analysis of self-reported pain covering 6,125,459 people aged 5 to over 100, drawn from 902 population-based data sources…

The Counterfeit Plate

Scientist examining analytical results on laboratory equipment.

What Testing Reveals, and What It Cannot, About Food Fraud in Global Supply Chains An evidence-led analysis of supply-chain vulnerabilities, testing limits and the economics of food fraud. 1. Introduction: The Scope of Misrepresentation Canadian inspectors identified fish labelled as…

The Invisible Commodity

A tied bundle of human hair prepared for use in hair extensions.

The Logistics, Labour, and Fortunes Behind Human Hair Extensions 1. The Origin: Ritual, Waste, and Survival At the Kalyanakatta, the tonsuring hall of the Sri Venkateswara Temple at Tirumala in Andhra Pradesh, devotees offer their hair in fulfilment of a…