Certification News Today — July 19, 2026
Image: The growing crescent of Mars as NASA's psyche mission approaches and more — today's certification signal.
As NASA's Psyche mission draws near to Mars, astronomers are reminded of the vast and complex history of our solar system. A shattered asteroid may have had a profound impact on Earth 800 million years ago, highlighting the dynamic and sometimes violent nature of celestial bodies. Meanwhile, the study of ancient DNA is providing new insights into the history of life on Earth, including the surprising revelation that koalas nearly went extinct before humans arrived.
These discoveries underscore the interconnectedness of our planet's ecosystems and the universe beyond. For example, research on fruit flies has identified a seasonal gene switch that locks them in winter mode, illustrating the intricate mechanisms that govern life on Earth. However, the effects of environmental changes can be far-reaching and unpredictable, as seen in the toxins from Florida's algal blooms that are now turning up in the air, posing an inhalation risk to people beyond the shorelines. As scientists continue to explore and study the natural world, they are revealing a complex and fascinating picture of our planet's history and its place in the universe.
Today's signal:
• Image: The growing crescent of Mars as NASA's psyche mission approaches (phys.org)
• Florida bloom toxins turn up in air, suggesting inhalation risk beyond shorelines (phys.org)
• Seasonal gene switch locks fruit flies in winter mode (phys.org)
• A shattered asteroid may have bombarded Earth 800 million years ago (sciencedaily.com)
• Koalas nearly went extinct before humans arrived, DNA study reveals (sciencedaily.com)