[As temperatures rise, energy demands peak, with a corresponding increase in air pollutants.](https://www.scientificamerican.com/podcast/episode/pollution-peaks-when-temperatures-top-out/)
[Women rate a man they see with an attractive woman as more desirable than an unattached man. Erika Beras reports.](https://www.scientificamerican.com/podcast/episode/partnered-up-men-more-attractive-to-women/)
[Bacteria swap DNA among themselves](https://www.scientificamerican.com/podcast/episode/insects-donate-dna-to-unrelated-bugs/). And that process may be more common in multicellular organisms than previously believed. Christopher Intagliata reports.