Scientists are currently interested in why temperatures at the surface of the ocean have been rising slower than in previous decades, even though we're emitting greenhouse gases faster than ever. (dotearth.blogs.nytimes.com)
Step on the box with one leg, then bring one other leg up to ensure you're looking at the surface of the box. (healthy4lifeonline.com)
Teaching teachers is more likely to lead to diversity in practice at a surface level of examination. (ciera.org)