A version of this story appears in the September 2020 issue of National Geographic magazine. Philadelphia detected its first case of a deadly, fast-spreading strain of influenza on September 17, 1918.

The mean ping time reveals the typical round-trip duration. Standard deviation indicates how much ping times vary from the mean. More pings may mean more accurate results, but the distribution of ping ...

Rolling return charts have recently become popular among DIY investors and advisors for mutual fund analysis. However, few ...

Thank you for reporting this station. We will review the data in question. You are about to report this weather station for bad data. Please select the information that is incorrect.

The April 2025 Iberian blackout revealed critical vulnerabilities in centralized power grids, emphasizing the need for technological upgrades like energy storage, AI, and hydropower ...