Our viewer’s question this week was posted by David Burgos from Colombia: Did some animal species survive the dinosaur era?

This week's question for Tomorrow Today is from Travor Daniel in Nigeria: Does too much social media cause depression?

Our viewer Gik Khing Nüchter in Indonesia wants to know if there are Polar Lights in the southern hemisphere too.

Our viewer question this week comes from Tabea Conrad in Berlin. She wants to know why people stop growing when they become adults?

Our viewer question this week comes from Mohamed Ehab Ragab in Egypt. He wants to know what impact climate change has on animals.

This week's viewer question comes from Brown Mbadiwe in Oweri, Nigeria. He wants to know how fish see in water.

COVID-19 tests can be expensive and time-consuming. To get an up-to-date picture of how the coronavirus has spread throughout the population, Rwanda regularly tests a cross-section of the population using a strategy called pool testing.

This week's viewer question was sent in by Arnulfo Quintanilla from El Salvador.

That's our viewer question this week and it comes from Amaia Angarita in Colombia.

Bangladesh banned single-use plastic bags in 2002 but does not enforce the ban. The bags are everywhere. A scientist in Dhaka has developed an eco-friendly biodegradable alternative made from jute.