Science & Discovery News Today — July 30, 2026

As we explore the vast expanse of scientific discovery, it's clear that understanding the past - whether it's the ancient history of our galaxy or the recent experiences of individuals - is crucial to shaping our present and future. Astronomers are delving into the 'fossils' of the Milky Way, seeking to uncover secrets of its formation and evolution, while archaeologists have uncovered tiny bird figurines carved from mammoth ivory by Ice Age artists, offering a glimpse into the creative and cultural practices of our ancient ancestors.

These investigations into the past are complemented by research that aims to address pressing issues in the present. For instance, scientists are working to improve the management of invasive species, which are emerging as a significant driver of human displacement, as well as developing more effective conservation strategies for vulnerable species like coho salmon. Meanwhile, other studies are focused on using data and machine learning to drive positive change in areas such as healthcare and social justice, including the development of more accurate equations for calculating cholesterol levels and the use of better data collection to prevent deaths in custody.

Today's signal:
• Meet the astronomer digging into the Milky Way's 'fossils' (phys.org)
• Machine learning LDL-C equation comparable to original Martin-Hopkins (phys.org)
• Invasive species emerge as a driver of human displacement, new research shows (phys.org)
• Ice Age artists carved thumbnail-size bird figurines from mammoth ivory 40,000 years ago (phys.org)
• Simple changes to fishing gear and handling can greatly improve survival of released coho salmon (phys.org)
• Better recording of prisoner inequalities could help prevent deaths in custody, new study finds (phys.org)