Nine years after he placed the first telephone call, Alexander Graham Bell tried another experiment: he recorded his voice on a wax-covered cardboard disc on April 15, 1885, and gave it an audio signature: "Hear my voice – Alexander Graham Bell."
The flimsy disc was silent for 128 years as part of the Smithsonian Museum's collection of early recorded sound, until digital imaging, computer science, a hand-written transcript and a bit of archival detective work confirmed it as the only known recording of Bell's voice.
Blast plant only $1m cover
The Texas fertiliser plant that exploded last month, killing 14 people, injuring more than 200 others and causing tens of millions of dollars in damage to the surrounding area had only $1m (€760,000) in liability coverage, lawyers have said.
On April 17, a fire at the company, in West,70 miles south of Dallas, was followed by an earth-shaking explosion.
It left a 90ft wide crater and damaged homes, schools and nursing home within a 37-block blast zone. Among those killed were 10 members of the emergency services.
Shoppers hate 'robotic' staff
Most shoppers find the "robotic" shopping culture of sales staff asking if they want help a turn-off, a consumer help website has found.
Two-thirds of shoppers (68%) find offers of assistance from pushy staff "annoying", according to a survey of more than 11,000 people by MoneySavingExpert.com.
This group said that they would rather be left alone to browse than asked: "Can I help you?" by an overly-zealous member of staff. However, one fifth (19%) thought there was no harm in being approached and said it saved them having to seek help.