4+ hour, 24+ min ago  (375+ words) In today's world, how can we make sure the many chemicals we encounter are safe? Over nearly 25 years, Khetani has developed tools that enable scientists to safely and accurately mimic human tissues. His group uses techniques such as microfabrication and…...

1+ mon, 3+ week ago  (683+ words) Shopping at a pharmacy, grocery or other store in the city of Chicago? You'll now pay $0. 15 for every disposable plastic bag you pack your purchases in. The bag tax, which went up" from $0. 10 on Jan. 1 this year, was implemented in…...