All large cryptocurrencies were down during U.S. morning trading on Monday, with Ripple XRP USD seeing the biggest move, dropping 4.98% to $2.00. Polkadot Polkadot USD dropped 4.00% to $6.60 ...

National Geographic's enterprising photographers have helped readers explore and learn about our beautiful world through their images for more than a century. Here is their best work from the past ...