The average temperature of the Earth is rising at nearly twice the rate it was 50 years ago. This rapid warming trend cannot be explained by natural cycles alone, scientists have concluded. The only ...

Energy in different forms, such as heat and electricity, fuels the economy and helps humans meet their basic needs. Although China has rich coal reserves, they are still finite in terms of quantity, ...

The humble hardtail mountain bike seems to be going through a mini-revival, with a raft of cross-country, downcountry, trail and even radder rigid frames being introduced. What are the advantages of a ...