At over $11 billion, the two smallest-cap companies in the S&P 500 are larger than Penske and have weights of 0.1% and 0.0%.

Explore a wide range of recent research in mathematics. From mathematical modeling to why some people have difficulty learning math, read all the math-related news here.

Padres needed to improve their starting rotation if they hoped to remain a contender, and they added two veterans having good seasons.

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