You may know Suleika Jaouad from Life, Interrupted, the pieces she writes on her cancer on The New York Times Well blog. She's also made time to speak with us over the past year starting last May, about a month after she received a bone marrow transplant. During that conversation, she told us: I feel very hopeful for the future, but I have definitely been humbled by everything I've been through. I don't think of myself as invincible or immortal anymore.
When a kid lops off a fingertip with a cleaver or car door, there's a chance the end of the digit will grow back. The fingerprint will be gone, and the tip may look a bit strange. But the flesh, bone and nail could return.
Now biologists at New York University have figured out just how this lizard-like regeneration happens in mice. There's some secret sauce at the nail cuticle that makes it possible, scientists report Wednesday in the journal Nature.
Residents of the Estonian capital of Tallinn can use public transportation for free after purchasing a special card for 2 euros.
Credit Bloomberg via Getty Images
The old town area of Tallinn, Estonia, is dotted with medieval buildings that reflect its long history. But the city has placed great emphasis on high-tech since the country broke away from the Soviet Union two decades ago.
The Baltic city of Tallinn hardly looks modern with its blend of medieval towers and Soviet-era architecture. Smoke-spewing buses and noisy streetcars look as if they have been plucked from the past.
Even so, the Estonian capital is one of the world's most technologically advanced cities. The birthplace of Skype has repeatedly been cited for its digital accomplishments. Last week, Tallinn once again made the short list of the world's most intelligent cities as selected by the Intelligent Community Forum.