Why antibiotic resistance can slow bacterial growth

Antibiotic resistance can protect bacteria but slow their growth

A mutation that gives a bacterium antibiotic resistance can also come with a cost, such as slower growth. Resistance may help the bacterium survive treatment while making it less successful when the antibiotic is absent.

Blu-ray stores more data because its laser makes smaller marks

25 GB vs 4.7 GB

A standard single-layer Blu-ray disc holds 25 GB, compared with 4.7 GB on a single-layer DVD. Blu-ray uses a shorter-wavelength blue-violet laser and optics that focus it into a smaller spot. That allows data marks and tracks to be packed more tightly on the disc. The difference is physical: more information fits into nearly the same-sized object.

Pennsylvania moved forced labor out of sight

In late-18th-century Pennsylvania, public work crews caused disorder, and witnesses felt sympathy for mistreated convicts. Reformers moved punishment and forced work into secluded prisons, keeping the labor but taking it out of public view.

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Why antibiotic resistance can slow bacterial growth

Antibiotic resistance can protect bacteria but slow their growth

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