


The Economist’s science and technology internship
We invite applications for the 2025 Richard Casement internship
The Economist is seeking promising journalists and would-be journalists to apply for the 2025 Richard Casement internship. The successful candidate will spend three months with us in London writing about science and technology, and receive payment. No previous experience is required. Applicants should compose a letter introducing themselves, a CV and an article of about 600 words that they think would be suitable for publication in the Science & technology section. This material should be sent to [email protected] by midnight (UK time) on February 28th. ■

A better understanding of Huntington’s disease brings hope
Previous research seems to have misinterpreted what is going on

Is obesity a disease?
It wasn’t. But it is now

Volunteers with Down’s syndrome could help find Alzheimer’s drugs
Those with the syndrome have more of a protein implicated in dementia
Should you start lifting weights?
You’ll stay healthier for longer if you’re strong
Does melatonin work for jet lag?
It can help. But it depends where you’re going
Training AI models might not need enormous data centres
Eventually, models could be trained without any dedicated hardware at all