Various professional sports leagues have attempted to set a level playing field by testing for drug use and suspending those found guilty.

FORBES: Why It's Time To Legalize Steroids In Professional Sports

Meera Syal and Jo Brand joined one of the first groups, playing "dementia fact bingo" and testing their memory of everyday objects, such as the features on a one-penny piece.

BBC: Comedians Meera Syal and Jo Brand are 'dementia friends'

Some reports have found the tablet won't recharge while playing power-intensive games, but Consumer Reports' testing showed that problem also to be limited.

CNN: Surprise! Consumer Reports' No. 1 tablet is the iPad

Testing began in January, and by April 30, 000 gamers were playing free of charge, so Cryptic could work out code bugs and make life easier for the fans.

FORBES: Ordinary Hero

These walls were a testing ground where Aalto experimented with different textures, materials and designs, playing with brick, stone and ceramic swatches and setting them against various finishes and ornamental plants.

BBC: An Alvar Aalto tour of Finland

Holt believes playing at Prestatyn's Pontin's holiday camp can be a testing experience, as UK champion Ding Junhui, found out when he lost his final qualifier 10-6 to rising star Barry Hawkins.

BBC: SPORT | Other Sport... | Snooker | Holt not worried by Ebdon tactics

But while there is compelling evidence that illegal, over-the-counter, and prescription drugs are playing an increasing role in traffic crashes, there are no standards or testing criteria for these substances, and their role in crashes is often under-reported.

WHITEHOUSE: Drunk and Drugged Driving: Not an Acceptable Part of Life

Playing games in 3-D "is something that we've been continually testing and working on at Nintendo, " said Hideki Konno, who has directed or produced some of Nintendo's most prized franchises and was a key person in the 3DS's development, through an interpreter.

CNN: Mark Milian