Matty J IV with A/Prof Shannon Kilmartin-Lynch for National Science Week 2025 –

For National Science Week 2025, Matty J chats with Associate Professor Shannon Kilmartin-Lynch — a proud Taungurung man and civil engineer blending modern engineering with sustainability and 65,000+ years of Indigenous knowledge. Shannon shares his journey from dreaming of building roller coasters to tackling the environmental impact of construction waste. We dive into his groundbreaking research, from turning waste coffee grounds and discarded PPE into concrete additives, to exploring native plant resins inspired by traditional techniques. Along the way, Shannon explains the hidden environmental costs of construction, how Indigenous perspectives can shape long-term sustainability, and why concrete — the world’s second most consumed material after water — is worth rethinking. We also talk about opportunities for young First Nations people in STEM, and Shannon’s highlight of Science Week: the Indigenous Virtual STEM Gallery. Find a National Science Week event near you: scienceweek.net.au