Senate Republicans have little margin for error as they prepare for a vote this coming week on a bill to repeal and replace the Affordable Care Act. Some lawmakers are already raising concern that the bill could aggravate the problem of healthy people going without insurance, driving up costs for everyone else.

Snakebites kill more than 100,000 people per year, the World Health Organization estimates. The organization recently took a step to reduce that number by adding venomous snake bites to its list of neglected tropical diseases – a classification that could help get more resources allocated to fighting this public health problem.

(WHO did acknowledge that snakebites aren't a disease but "an injury" but the "envenoming" — the injection of the snake's venom — can be considered a disease.)

Welcome to this week's edition of our national education news roundup.

DeVos appoints current student loan company CEO to head student loan agency

Wayne A. Johnson will be the new head of Federal Student Aid after James Runcie abruptly resigned last month, the U.S. Department of Education announced this week. FSA is the agency responsible for administering $1.4 trillion in outstanding student loans from 42 million borrowers, plus other aid programs for millions of college students.

He brooded, as Lincoln.

He seduced in The Unbearable Lightness of Being. And he murdered, in There Will Be Blood.

This week, Daniel Day-Lewis — a three-time Oscar winner, and incomparable film chameleon — announced he is retiring from acting at 60.

A statement released by his spokeswoman gave no explanation, saying this is a private decision, and that Day-Lewis will have no further comment.

The actor has often taken lengthy sabbaticals between films, but this time it's apparently permanent.

So what will he be doing?