Ball point pensWhen NASA started sending astronauts into space they quickly discovered that ball-point pens would not work in zero gravity.To combat this problem, Congress approved a program and NASA scientists spent a decade and over $165 million developing a pen that writes in zero gravity, upside down, on almost any surface and at temperatures ranging from below freezing to over 300 C.The Russians used a pencil...Your taxes are due again in April
No comments:
Post a Comment
Just click on the comment button for each post that you are interested in. If you are not a blogger you may comment without a password by choosing the Name/URL button and putting in e.g. your name and then entering your comment in the large text box and then click on the publish comment button down below! :)