LEVEL1
LEVEL2
- Safe or Not? Black Spots on Sweet Pot...
- During sweet potato season, many are hesitant to eat sweet potatoes that have turned black in some places. But not al...
- How Was Black Hole M87 Photographed?
- A black hole is a place in space where gravity is so strong that nothing can escape ?? not even light! In 2019, scien...
Level3
- Why Retirement Isn’t the Finish Line ...
- For many teenagers, finishing school feels like the end of hard work. But for many Korean seniors, ??finishing work??...
- Delhi’s Winter Smog Puts Children in ...
- Delhi??s air has turned toxic again this winter, and children are bearing the brunt of the crisis. Nearly four out of...
LEVEL4
- Warm Getaways vs. Cold-Weather Fun
- What??s This About? During winter break, many people travel to warm places, including the Philippines, Vietnam, or H...
- New Study Sheds Light on How Easter I...
- On a remote Pacific island called Rapa Nui, also known as Easter Island, nearly 1,000 massive stone figures known as ...
- Sardine Shortage Threatens African Pe...
- More than 60,000 African penguins at two major colonies off South Africa??s coast starved to death after sardine popu...
