We’ve rounded up some of our favorite artificial Christmas trees, many of which we’ve tested firsthand. To kick off the bulk ...

Most research on plant stem cells focuses on the tips of roots and shoots, where growth occurs in height. But biologist ...

On average, Americans spend about 90% of their time indoors, and the air we breathe at work, school or home affects our overall health and well-being. Most air purification systems, however, are expen ...