From Alex McDowell, London, UK
Your story on a biogel that could be used in body armour focuses on fending off supersonic bullets(17/24 December 2022, p 13).
I think it could do so much more. If used on tanks, it could protect against neutron bombs as well as armour-piercing rounds.
Neutron bombs were proposed as a weapon to use against tanks. They would be detonated above a battalion of these vehicles and the burst of neutrons would penetrate their armour, with lethal effects on the crew. Hydrogen-based materials, such as biogel armour, protect well against neutrons.
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