Science

3D Positions of Atoms Mapped Precisely Using a Quantum Microscope
3D printed fingertip 'feels' like human skin - jim o brien
3D Printing Could Solve This Huge Mars Problem - SlashGear
3D robotic spine 'twin' and sensor offer new way to preview surgical interventions - Science Daily
4 planets will align tomorrow morning for the first time in 1000 years - Happy Mag
4 Tips to Reduce Transportation Expenses
4.4 million galaxies are visible in this new map of the night sky - CBS News
4.4 million galaxies revealed by scientists in new study - The Siasat Daily
40 quintillion stellar-mass black holes are lurking in the universe, new study finds - Livescience.com
45 years ago, NASA's first Space Shuttle only went five miles up — and changed spaceflight forever - Inverse