(10)___ a "leave no trace" policy. Small solar panels are used to generate electricity and buildings are simple with nothing (11)___ left in place. "Rabbit Island exists to encourage the community to(12)___ the most fundamental part of our age --- the environment and the human rela...
Cool gadgets that fit in a backpack can be hard to find. And that's why we've rounded the coolest tech that you can fit in a rucksack.
Every time your fingers touch your cell phone, they leave behind trace of amounts of chemicals. And each chemical offers clues to you and your activities. By studying them, scientists might be able to piece together a story about your recent life, a new study finds. A molecule (分子) is...
Every time your fingers touch your cell phone, they leave behind trace of amounts of chemicals. And each chemical offers clues to you and your activities. By studying them, scientists might be able to piece together a story about your recent life, a new study finds. A molecule (分子) is...