Answer Wiki. Sand sharks a/k/a sand tiger, grey nurse and ragged tooth. Their name reportedly comes from their habit of hanging out near the shoreline, trolling the ocean floor where the waves break close to the beach. While they're considered relatively docile and mind their own business, they apparently will attack a human if provoked.
Contemporary energy transitions differ in terms of motivation and objectives, drivers and governance. In a more narrow sense, a sustainable energy transition is the shift by some countries, most notably Germany (German: Energiewende), to decentralised renewable energy, and energy efficiency.
As to why ATP ended up heavily favored as an energy currency as opposed to GTP, which is more favored in common signaling pathways, I can only offer two observations that might be factors: The body needs to have some way to use energy for signalling and to use energy for other purposes.