Pictures in email messages that are actually linked and downloaded from the Internet can also be used as a way to confirm that you opened the message. This is known as a web beacon. For example, a junk email sender can confirm that they have reached an active email address when the picture in the message is downloaded.ote When you click Download Pictures in a message that you are previewing in the Reading Pane, the message is automatically saved and displays the pictures again the next time that you open the message.
1 Sir Isaac Newton was an English mathematician and mathematician and physicist who lived from 1642-1727. 2  The legend is that Newton discovered Gravity when he saw a falling apple while thinking about the forces of nature.
Interestingly, Newton wasn't the first scientist to come up with the law of inertia. That honor goes to Galileo and to RenÃ© Descartes. In fact, the marble-and-ramp thought experiment described previously is credited to Galileo. Newton owed much to events and people who preceded him.