However, what gets released is a flammable gas vapor that could potentially catch fire. This spreads to the other battery cells and forms a chain reaction. "We call it thermal runaway," Lee said.

VO₂ max is a good benchmark for measuring your aerobic fitness levels. Learn how VO₂ max is measured, how you can increase it, and its training benefits.

In all, the Earth’s water content is about 1.39 billion cubic kilometers (331 million cubic miles), with the bulk of it, about 96.5%, being in the global oceans. As for the rest, approximately 1.7% is ...