Magnetic resonance imaging (MRI) is a non-invasive biomedical imaging technique that uses a strong oscillating magnetic field to induce endogenous atoms such as hydrogen, or exogenously added contrast ...

We’ve rounded up the best MagSafe, Qi2, Qi2 25W, and MagSafe-compatible magnetic chargers, from the plain pad to multi-functional stands (up to six devices charged), and even the most colorful—from ...

Steering nanobots in crowded biological environments raises questions about the limits on the size of a steerable propeller under thermal noise. Here, the authors theoretically investigate ...

Julia Kagan is a financial/consumer journalist and former senior editor, personal finance, of Investopedia. Toby Walters is a financial writer, investor, and lifelong learner. He has a passion for ...

The Magnificent Seven represent 34.3% of the S&P 500 as of December 2025, up from 12.3% in 2015. From 2015 to 2024, these seven companies achieved a 697.6% return, outperforming the S&P 500. The S&P ...