Does every star have planets?
The answer of astronomers is “no”, but they add it is a question of whether they detected a planet near …
What is normal blood sugar?
Normal blood sugar levels vary from person to person, but a normal range for fasting blood sugar (the amount of …
Who invented Bluetooth and how does it work?
Bluetooth is a method of short-range wireless communication between electronic devices that harnesses the power of radio waves. But if …
When did humanity realize the risks of climate change?
Over 3,000 years ago, in Ancient Greece, people debated whether draining swamps or cutting down forests might bring more or …
What countries have the most islands?
Three Scandinavian states are the world’s leaders in terms of islands being part of their national territory. Sweden is home …
What are Trojan asteroids and how many of them are sharing orbit with the Earth?
Trojan asteroids are small bodies orbiting around the L4 or L5 Lagrangian points of a Sun-planet system. Because of their …
How many tree species inhabit the Earth?
Based on the latest global ground-sourced data, scientists estimate that there are ∼73,000 tree species globally, among which ∼9,000 tree …
What are top 10 countries with the most trees?
There are over three trillion trees in the world and here are top 10 countries where most of them grow. …
What is the most accurate “flat map” of Earth?
We have drawn various flat maps over the centuries, but they all have the same issue: It is impossible to …
Why does electricity make a humming noise?
The electricity that comes from power plants uses alternating current (AC), so named because the current changes direction, or alternates, …