Data Science

A personal health agent shouldn’t just chat about sleep; it should compute it, contextualize it, and coach you through changing it. The paper we review today—The Anatomy of a Personal Health Agent (PHA)—is the most structured attempt I’ve seen to turn scattered “AI wellness tips” into a modular, evaluable system: three specialized sub‑agents (Data Science, Domain Expert, Health Coach) orchestrated to answer real consumer queries, grounded in multimodal data (wearables, surveys, labs). It reads like a playbook for product leaders who want evidence‑backed consumer health AI rather than vibe‑based advice. ...

Most “AI for analytics” pitches still orbit model metrics. The more interesting question for executives is: What should we do next, and why? A recent paper proposes an AI Data Scientist—a team of six LLM “subagents” that march from raw tables to clear, time‑boxed recommendations. The twist isn’t just automation; it’s hypothesis‑first reasoning. Instead of blindly optimizing AUC, the system forms crisp, testable claims (e.g., “active members are less likely to churn”), statistically validates them, and only then engineers features and trains models. The output is not merely predictions—it’s an action plan with KPIs, timelines, and rationale. ...

As AI systems become more capable of automating every stage of the data science workflow—from formulating hypotheses to summarizing results—it might seem we’re inching toward a world where “data scientist” becomes just another automated job title. But Timpone and Yang’s new framework, presented in their paper AI, Humans, and Data Science (2025), offers a powerful antidote to this narrative: a structured way to evaluate where humans are indispensable—not by resisting automation, but by rethinking our roles within it. ...

The Multimodal Mirage In recent years, there’s been growing enthusiasm around combining unstructured text with time series data. The promise? Textual context—say, clinical notes, weather reports, or market news—might inject rich insights into otherwise pattern-driven numerical streams. With powerful vision-language and text-generation models dominating headlines, it’s only natural to wonder: Could Large Language Models (LLMs) revolutionize time series forecasting too? A new paper from AWS researchers provides the first large-scale empirical answer. The verdict? The benefits of multimodality are far from guaranteed. In fact, across 14 datasets spanning domains from agriculture to healthcare, incorporating text often fails to outperform well-tuned unimodal baselines. Multimodal forecasting, it turns out, is more of a conditional advantage than a universal one. ...