Former US President Barack Obama said he’s seen no evidence that aliens have made contact with Earth, clarifying his position on extraterrestrials after comments he made in a podcast went viral.

Microsoft's document-scanning Lens app is no longer available for download. For basic scanning, try Apple Notes, Google Drive, or PhotoScan. For more advanced features, look at Adobe Scan or iScanner.

Gear-obsessed editors choose every product we review. We may earn commission if you buy from a link. Why Trust Us? Here’s what you will learn when you read this story: Abiogenesis—the emergence of ...

Scanning probe microscopy images a sample by scanning a physical probe just above the surface. A variety of different probes and detection modalities can be used to generate either a topological map ...