Naked Scientists: Decarbonizing Cement, RNA Based Bispecific Antibodies, and Caterpillar Electroreception

The Naked Scientists episode surveys three distinct scientific frontiers. Cambridge engineers reveal a method to recycle old cement to both lower cement and steelmaking emissions by piggybacking on an existing electric heat process and using demolition cement as lime, potentially cutting carbon foot­prints by up to two thirds and even enabling concurrent steel and cement production. Researchers also discuss a Nature paper that links the Cambrian explosion to preexisting Ediacaran life through ocean mixing and sediment disturbance. In cancer biology, BioNTech describes an RNA based approach to produce bispecific antibodies that redirect T cells to Claudin 6 expressing tumours, showing promise in preclinical models and early human trials. Finally, caterpillars detect predator generated electric fields from wasp wings, a finding with implications for understanding electric field perception in insects.

• Low carbon cement via old cement and electric heat
• RNA driven bispecific antibodies for cancer therapy
• Caterpillars sensing wasp predator electricity
• Milk froth physics and nanofoaming advance

Overview of the podcast theme

The Naked Scientists bring together several cutting edge developments in science and technology across engineering, biology, and ecology. The episodes highlight how fundamental research can translate into practical solutions for industry and the environment, while also exploring how new technologies are tested from lab to pilot scales and into early clinical settings.

Decarbonising cement and steelmaking with old cement and electricity

The first major segment frames cement as a leading global source of CO2 and energy consumption, with cement and steelmaking as two of the largest industrial emissions sources. Cambridge engineers publish a Nature paper describing a process that uses old waste concrete as a lime source for steelmaking and couples this with a high temperature electric heating route, enabling cement production in the same plant where steel is processed. The approach aims to fix two problems at once: prevent CO2 release from cement ingredients and eliminate carbon intensive heat sources. Early scale up includes lab tests, pilot tests, and a plan to reach roughly 60 tonnes of product in a two hour window at larger facilities. The researchers estimate a worst case carbon footprint reduction of around two thirds, potentially making cement significantly greener than traditional recycling alone. Names highlighted include Cyril Dunant from Cambridges Department of Engineering. Implications include a potential step change in the energy economics of cement and steel and a new route to lower emissions in heavy industry.

The Cambrian explosion and the Ediacaran environmental stage

The podcast then turns to paleobiology with Emily Mitchell describing a Current Biology study that reconstructs how early animals might have contributed to the Cambrian explosion. Using exceptional fossil preservation, spatial statistics, and computational fluid dynamics, the team infers that the early, sediment-disturbing life forms churned up subsurface sediment and circulated nutrients, potentially helping to create ecological niches and drive diversification. The discussion emphasizes that the Cambrian radiation likely arose from a combination of environmental and biological processes, including enhanced vertical mixing of the water column, sediment stirring, reef formation, and increased biomineralisation. The interview underscores the idea that much of life on Earth began in microbial contexts, with animals later exploiting newly created environmental opportunities.

Cancer immunotherapy via RNA driven bispecific antibodies

The conversation then covers a biotech advance from BioNTech, applying their RNA technology to instruct the liver to produce bispecific antibodies. These antibodies act as bridges between tumour cells and cytotoxic T cells by binding a tumour associated antigen, Claudin 6, and the T cell receptor CD3. The RNA encoded antibodies are produced in the body, enabling sustained expression and potentially faster development cycles. Preclinical mouse models show elimination of human tumours, with ongoing human clinical trials. The discussion addresses risk management around cytokine release, and highlights that Claudin 6 is largely absent from adult tissues, enhancing safety as a target.

Electroreception in caterpillars and environmental electric fields

The final main segment reports on a Bristol University study showing that a wasps wings generate electric fields detectable by caterpillars that prey on them. The team measured charges on wasps and caterpillars, ran simulations of extracellular fields, and exposed various caterpillar species to the resulting fields. Diverse defensive behaviours emerged including coiling and biting. The researchers note that anthropogenic electric fields from power lines and devices create a potential environmental interference with electromagnetic sensing in nature, raising concerns about ecological consequences and suggesting mitigation strategies such as shielding infrastructure.

Question of the Week and audience engagement

As is customary, the program closes with a science question about why milk froth forms when heating milk, with a guest expert explaining the roles of surfactants, protein stability, and the impact of bubble size. The host also invites listener questions and donations to support the Naked Scientists.

Conclusion and cross-disciplinary connections

The podcast demonstrates how engineering, biology, and ecology intersect with climate action, personalised medicine, and environmental stewardship. The topics emphasize that transformative progress often requires scaling lab discoveries to pilot and industrial scales, aligning safety, efficiency, and sustainability with public health and planetary health objectives. Names cited include Cyril Dunant, Emily Mitchell, and Christiana Stadler, and the program signals ongoing coverage across biology, chemistry, and environmental engineering in future episodes.