Delicious, a powerful social bookmarking tool, has been around for what seems like forever, and while it may not get as much press as Digg, it still has an extremely active and loyal group of users. There are a number of tools out there that cater to these users, some of which still even stick by the old del.icio.us moniker.
Anthropologist John Hawks is interviewed in the latest issue of Nature talking about how humans have been undergoing accelerated evolution over the past 40,000 years, largely due to cultural shifts affecting our genes.