Billions of insects are moving together over the sky like a black cloud. It's a swarm of locusts. Many insects move in huge swarms. They form swarms for different reasons. Some move together to look for food or to find new homes. Sometimes insects swarm for protection. These enormous swarms can destroy food crops and harm other living things.

When something disturbs a red fire ants' nest, out they will come. Not just one or two, but thousands of them. The fire ants swarm all over their victim. Their stings burn like fire. Each ant in the swarm can sting over and over again. The fire ants hold onto their victim with their mouth parts. Then they inject their prey with poison. Most small animals cannot survive the stings from a swarm of fire ants.

When army ants are on the move, anything in their path is prey. Even snakes can' t escape a swarm of these stinging ants. Army ants move together to look for food. They can't see their prey, but they use smells and sounds to find their way. If they come to a river, they make a bridge with their bodies. They cling together with their legs. Then the rest of the ants can cross the bridge. There is not much that can stop these fierce and cruel ants from chasing their prey.

Insects are not the only animals that swarm. There are many others that do. Most are not harmful to people. Being close to a huge swarm of animals can be scary and dangerous. Some scientists have studied animal swarms. They have found that many swarms follow simple rules. They work together to solve problems. When they work together they are a very strong team.

Singapore's government has approved the sale of a laboratory-grown chicken meat. The American company that invented the product, Eat Just, says it is the first time lab-grown meat has received such approval anywhere in the world. Lab-grown meat — also called clean or cultured meat — is created from animal cells in a laboratory. The product is made without harming animals. The cells grow directly into the meat, outside of any animal.

The Eat Just product is to be sold as small pieces, called nuggets. The product is set to launch at a Singapore restaurant "in the very near term," the company's CEO Josh Tetrick told Reuters news agency.

Demand for alternatives to animal meat is rising across the world because of public concerns about health, animal welfare and the environment. Plant-based products — popularized by companies like Beyond Meat, Impossible Foods and Quorn — are selling in a growing number of stores and restaurants. But the development of lab-grown meat has been much slower than that of plant-based versions. The main reason for the delay is money. Lab-grown meat costs a lot more to produce.

Tetrick said the San Francisco-based company is also seeking approvals from U. S. government agencies. But he added that Singapore was a "good bit" ahead of the United States. The Singapore Food Agency said it examined data from processing, production control and safety testing before approving Eat Just sales. Tetrick said it is likely that the U. S. and countries in Europe and elsewhere will examine Singapore's approval system and will attempt to create a similar process.

Eat Just was founded in 2011 and has raised more than $300 million, Tetrick said. The company is valued at around $1. 2 billion. Worldwide, more than 24 companies are testing lab-grown fish, cow and chicken meat. They are hoping to break into a new part of the alternative meat market. Financial experts at Barclays Bank have estimated the market could be worth up to $140 billion by 2029. Competitors in the market have also been able to raise large amounts of money and win support from well-known investors.

Toy industry experts say some people in the United States are turning off their electronic devices to play with classic toys like board games. This is especially true among the so-called millennial generation (千禧一代). One coffee shop in Los Angeles is making profitable use of the increase in popularity of board games.

GameHäus Café opened in November of 2013. The café is dedicated to board games. It has more than 750 games available for its customers. The business does not feature wireless Internet connection. Many customers like Roxanne Lee and her husband Agassi Lai think that is good. Ms. Lee praises the atmosphere of the café. "I think it's very interesting for spending quality time together so that's why I like it."

Agassi Lai used to like playing video games. But everything changed when he discovered board games a few years ago. He likes to play a board game called "Escape the Curse of the Temple."

You keep rolling the dice and try to move to different places and try to escape the temple. Twenty-three year-old Weland Bourne is one of those board-game-loving millennials. "I think more with my generation, they're wanting to take time. They're wanting to take it slowly and I think, too, video games have kind of lost their attraction"

Adrienne Appell is with the Toy Industy Association, She says the new generation just wants to put down the telephone and Tablet and connect directly with other people.