Skip to main content
Part of complete coverage on

Tweets to make you smile: The secret to happiness, straight from the experts

By Meera Senthilingam, for CNN.
updated 5:26 AM EDT, Fri October 3, 2014

ADVERTISEMENT
Part of complete coverage on
updated 5:58 AM EDT, Wed April 2, 2014
A 3-D printed exoskeleton is helping children with a rare neuromuscular disease.
updated 7:09 AM EDT, Wed March 19, 2014
mohammad daniel project daniel
Artificial limbs made by 3-D printing are changing the lives of amputees in Sudan.
updated 6:02 AM EDT, Thu April 24, 2014
A device for extracting water from air is being used by the military -- could it help developing countries too?
updated 5:31 AM EDT, Fri May 23, 2014
Air-cleaning pavillion to be launched at the 2015 Milan Expo
Air pollution is now the biggest global environmental killer, but these high-tech solutions could save lives.
updated 1:18 PM EDT, Wed May 28, 2014
TB is growing increasingly drug resistant -- and it's becoming a global problem.
updated 3:48 PM EDT, Fri August 22, 2014
A picture taken on June 28, 2014 shows a member of Doctors Without Borders (MSF) putting on protective gear at the isolation ward of the Donka Hospital in Conakry, where people infected with the Ebola virus are being treated. The World Health Organization has warned that Ebola could spread beyond hard-hit Guinea, Liberia and Sierra Leone to neighbouring nations, but insisted that travel bans were not the answer.
Nearly 40 years after Ebola was discovered, there is no cure. But could experimental vaccines protect people?
updated 6:27 AM EDT, Fri May 9, 2014
A Southern Sudanese man uses a pipe filter to protect himself from Guinea worm disease while drinking water from a potentially infected source. The pipe filter strains out the water fleas that can contain Guinea worm larvae.
Guinea worm disease once infected millions -- now it's almost eradicated. But can we catch the final cases?
updated 11:44 AM EDT, Thu April 17, 2014
3d printed eye
Scientists are bioprinting human body parts from ears to bones. Here are some the most impressive advances.
updated 4:40 AM EST, Tue December 30, 2014
robohand metal hand
A South African carpenter lost his fingers in an accident -- now he's making mechanical fingers and hands for others.
updated 5:32 AM EDT, Fri May 16, 2014
care o bot
Robot carers are helping elderly people, watching their health and keeping them company.
updated 10:46 AM EDT, Thu May 1, 2014
A woman fills in a glass of water on April 27, 2014 in Paris. AFP PHOTO / FRANCK FIFE
Half the world is facing water shortages, so is it time for us all to start drinking recycled sewage?
vital signs logo
Vital Signs is a monthly program bringing viewers health stories from around the world.
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT