A fitness tracker is a small gadget that you wear on your wrist, like a

Blinking is the quick closing and opening of eyelids. It takes up to 400 milliseconds

A vending machine is an automated machine that gives you snacks and drinks without needing

Using more clean sources of energy like sunlight, wind and water instead of burning coal

When we learn something new, our brain reorganises itself by forming new neural pathways or

Airports have a big system of conveyor belts to move bags from check-in to the

The upper levels of the ocean are stratified by temperature and salinity— warm, fresh water

Metals are known to be good conductors of heat.

Toll booths help collect money to fix roads, bridges and motorways.

Yes, animals can talk to each other— but not in words like humans.