Some cool facts :

1. The human brain has more molecular connections than there are stars in the galaxy. A typical brain has about 86 billion neurons that are connected via trillions of synapses.

2. Black holes are so dense that they create powerful gravitational fields that suck in everything around them, including light. Scientists have imaged the supermassive black hole at the center of our galaxy for the first time.

3. The hottest temperature ever recorded on Earth was 156°F (69°C) in Death Valley, California in 1913. Meanwhile, scientists have created a temperature of 7.2 trillion degrees Fahrenheit in a particle accelerator.