As soon you wake up, hit the floor and do 20 push-ups.

FORBES: Here Are Some 100-Calorie Workouts For Your Work Day

Zhanna Block ran a personal best to win gold in the women's 60m, leaving Angie Williams in her wake as she pulled away over the last 20 metres.

BBC: Gatlin storms to brilliant gold

Some 20 years later, in the wake of the publication of the final part of the trilogy, The Return of the King, WH Auden wrote that the cycle surpassed Milton's Paradise Lost.

BBC: Rings fellowship keeps on growing

Modern babies wake up three times a night and take 33 minutes to settle each time, compared to babies in the 1960s and 1970s who tended to only wake twice in the night and took just 20 minutes to settle.

BBC: NEWS | Health | Modern mothers 'have less sleep'

Colorado and New York also passed new gun-control requirements in the wake of the Newtown shooting, in which a 20-year-old gunman used a military-style semiautomatic rifle.

WSJ: Connecticut Lawmakers Pass Wide-Ranging Gun-Control Bill

Colorado and New York also passed new gun control requirements in the wake of the Newtown shooting, in which a 20-year-old gunman used a military-style semi-automatic rifle.

NPR: Conn. Governor Signs Sweeping Gun Limits Into Law

The sounds are played around 20 minutes before participants say they want to wake up.

BBC: Can you control what you dream?

United, the nation's second-largest airline, laid off 20, 000 people and cut hundreds of flights in the wake of the September 11 attacks.

CNN: White House ready to delay strike at United

The Finn needed only two pit stops compared to three stops for each of the six men who followed in his wake, and he became the 15th driver in F1 history to record 20 grand prix wins.

NPR: Lotus' Raikkonen Wins F1's Australian GP