As Ken Ferrie evaluates disease challenges he sees in cornfields right now, tar spot comes to the top of his list of concerns. “We’ve got a lot of areas that are picking up these 3-, 4-, 5-inch rains, ...

iPhone 17 Air may debut as Apple's thinnest phone ever. Single rear camera shows Apple's thinness trade-offs. Expected to debut on Sept. 9, 2025, priced around $900. Apple is rumored to be spicing ...

先说氢弹。这玩意儿可不是普通的炸弹，它的爆炸需要极高的温度，靠自己根本达不到。所以，科学家们想了个办法：先用原子弹炸一下！原子弹爆炸时，温度高得吓人，能瞬间把周围“烤”到几千万度。这股高温就像点火器，迅速“点燃”氢弹，让它发生核聚变，释放出巨大能量。根据爱因斯坦的公式，质量少了，能量就出来了，威力大到能把一切炸得干干净净。