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Engineers are racing to build robots that can take the place of rescuers. That story, plus a city that storms can't break and how having fun could lead to breakthrough science.
Also! A leech detective, the solution to America's train-crash problems, the world's fastest baby carriage, and more.


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Folks -- You can't get something 'for free' -- you get it free. Using the word 'for' implies an exchange. EG: I will give you two of these FOR one of those. Since you can't give anyone a 'free,' inclusion of the word 'for' is incorrect. Therefore, "Evernote is available FREE on iOS, Android, BlackBerry, and Windows Phone, as well as versions for both operating systems (Mac OS X, Windows) and browsers (Chrome, Firefox, Safari)."
Regards.
Spunky: That's true; but I'm afraid "for free" is too deeply entrenched in American English to be got rid of now.
And, after all, we do say "for nothing": "I got it for nothing". There's no exchange involved here either. This could in fact be how the usage "for free" evolved.
A number of other wrong usages are now catching on in American English, out of ignorance and/or laziness. For example, many Americans use lay in place of lie, and laid in place of lay, as for example:
"I want to lay down on the grass", and
"I laid down on the grass this morning".
The correct usages should be "lie" and lay" respectively, as follows:
"I want to lie down on the grass" and
"I lay down on the grass this morning".
One could cite many more examples of wrong usages getting standardised in American English.